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Chinese Holidays and Festivals Post By：2008-12-2 19:55:05 As well known, different countries have different customs and cultures. With the development of China, it has a rich and unique culture. The holidays and festivals in China are quite different from those in other countries. We have many traditional holidays and festivals. In addition, people in different areas also have their own local Year —元旦It falls on the first day of the year. It marks the beginning of a year. People will plan what to do in the new year. Because they believe that the whole year's work depends on a good start in Festival —春节Spring Festival is the most important festival in China. It is on the first day of the first lunar month(阴历正月). On the eve of the festival, people will paste spring poems(贴春联)with lucky words. They prepare delicious food, dumpling is a must. They also clean their house, but there is no sweeping on spring festival for people think it will sweep away good luck. People often come back home to enjoy family reunion, the whole family will get together for the big dinner. They also exchange greeting with other friends and Festival 元宵节It comes on the 15th of the first lunar month and it marks the end of the Spring Festival. On this day, people often eat sweet dumplings（元宵）for good luck. They will visit the display of lanterns(灯展)or go to temple fair(庙会)Qingming 清明节Qingming —It is also called Tomb-Sweeping Day. It falls on April 4th or 5th . That is a special day for the living to show love and respect to their dead friends or relatives. People often go to sweep the tomb and put the meat, wine in front of the tomb. One interesting thing is that people burn the paper money for the dead. Dragon Boat Festival 端午节This day is on the fifth of the fifth lunar month, People often get together to watch the wonderful “Dragon Boat Race”(龙舟大赛)，Rice Dumpling(粽子) is a must on Dragon Boat Festival. People eat Rice Dumpling in memory of the famous poet-屈原who died on this day many years Day —中秋It comes on the 15th of the eighth lunar month. People often gaze at the “Lady in the moon”(嫦娥) and eat moon cakes. The Mid-autumn Day also means harvest
泰哥，我给你找了几个，必须采纳啊！ To Pull up the Seedlings to Help Them Grow “拔苗助长” Once upon a time, there was an old farmer who planted a plot of rice. After he planted the seedlings, every day he went to the field to watch the seedlings grow. He saw the young shoots break through the soil and grow taller each day, but still, he thought they were growing too slowly. Eventually he got impatient with the young plants and suddenly he hit upon an idea that one by one, he pulled up the young plants by half an inch. The next early morning, the young man couldn’t wait to check his “achievement”, but he was heart-broken to see all the pulled-up young plants dying. 从前，有个农夫，种了稻苗（seedlings）后，便希望能早早收成。每天他到稻田时，都发觉那些稻苗长得非常慢。他等得很不耐烦。想了又想，他终于想到一个“最佳方法”，他将稻苗全都拔高了几分。第二天，一早起身，他迫不及待地去稻田看他的“成果”。 哪知，却看到所有的稻苗都枯萎了。Plugging One’s Ears While Stealing a Bell “掩耳盗铃” Once upon a time, there was a man who wanted to steal his neighbor’s doorbell. However, he knew clearly that the bell would ring and catch the other people’s attention as long as he touched the bell. So he thought hard and suddenly hit on a clever “idea”. He plugged his ears with something, thinking that everything would go well when he stole the bell. Unfortunately to his disappointment, the bell still rang loudly and he was caught on the spot as a thief. 从前，有一个人想偷邻居门上的铃，但是他知道一碰到铃，铃就会响起来，被人发现。他想啊想，终于他想出一个“妙极”，他把自己的耳朵用东西塞起来，就听不见铃声了。但是当他去偷铃时，铃声仍旧响起来，他被别人当场抓住The Fox and the Crow “狐狸和乌鸦” One day a crow stood on a branch near his nest and felt very happy with the meat in his mouth. At that time, a fox saw the crow with the meat, so he swallowed and eagerly thought of a plan to get the meat. However, whatever the fox said to the crow, the crow just kept silent. Until the fox thought highly of the crow’s beautiful voice, the crow felt flattered and opened his mouth to sing. As soon as the meat fell down to the ground, the fox took the meat and went into his hole. 有一天,一只乌鸦站在窝旁的树枝上嘴里叼着一片肉，心里非常高兴。这时候，一只狐狸看见了乌鸦，馋得直流口水，非常想得到那片肉。但是，无论狐狸说什么，乌鸦就是不理睬狐狸。最后，狐狸赞美乌鸦的嗓音最优美，并要求乌鸦唱几句让他欣赏欣赏。乌鸦听了狐狸赞美的话，得意极了，就唱起歌来。没想到，肉一掉下来，狐狸就叼起肉，钻回了洞Draw a Snake and Add Feet to It “画蛇添足” Long long ago, several people had a jar of wine among them and all of them wanted to drink it by himself. So they set a rule that every one would draw a snake on the ground and the man who finished first would have the wine. One man finished his snake very soon and he was about to drink the wine when he saw the others were still busy drawing, so he decided to draw the feet to the snake. However, before he could finish the feet, another man finished and grabbed the jar from him, saying, "Who has ever seen a snake with feet?” The story of "Draw a snake and add feet to It.” tells us going too far is as bad as not going far enough. 古时几个人分一壶酒。他们都想独自喝完那壶酒，所以就定了一个规矩：每人在地上画一条蛇，谁画得最快，这壶酒就归谁。有一个人很快就把蛇画好了。他正打算喝这壶酒时，看见别人都还在忙着画，就决定给蛇再画上几只脚。结果，他的蛇脚还没加完，另一个人已经把蛇画好了。那人一下把酒壶夺了过去，说：“有谁见过长脚的蛇？”。这个故事告诉我们这样的道理：做得过分和做得不够都是不对的
随着科学技术的飞速发展和全球化进程的不断加快，科普 文章 在向社会大众普及科学技术知识，提高公众科学素养等方面发挥着举足轻重的作用。下面是我带来的科普类英语文章，欢迎阅读!
科普类英语文章
生物与环境平衡的危机
The history of life on earth has been a history of interaction between living things and their surroundings. To a large extent, the physical form and the habits of the earth’s vegetation and its animal life have been molded by the environment. Considering the whole span of earthly time, the opposite effect, in which life actually modifies its surroundings, has been relatively slight. Only in the present century has one species man acquired significant power to alter the nature of his world.
During the past quarter century this power has not only become increasingly great but it has changed in character. The most alarming of all man’s assaults upon the environment is the contamination of air, earth, rivers, and sea with dangerous and even lethal materials. This pollution is for the most part irrecoverable. In this now universal contamination of the environment, chemicals are the sinister partners of radiation in changing the very nature of the world the very nature of its life. Chemicals sprayed on croplands or forests or gardens lie long in soil, entering into living organisms, passing from one to another in a chain of poisoning and death. Or they pass mysteriously by underground streams until they emerge and combine into new forms that kill vegetation, sicken cattle, and work unknown harm on those who drink from once pure wells. "Man can hardly even recognize the devils of his own creation," as a scientist has said.
It took hundreds of millions of years to produce the life that now inhabits the earth. Given time not in years but in millennia life adjusts, and a balance has been reached. But in the modern world there is no time.
The rapidity of change follows the impetuous pace of man rather than the deliberate pace of nature. Radiation is now the unnatural creation of man’s tampering with the atom. The chemicals are the synthetic5 creations of man’s inventive mind, having no counterparts in nature.
To adjust to these chemicals would require not merely the years of a man’s life but the life of generations. And even this, were it by some miracle possible, would be futile, for the new chemicals come from our laboratories in an endless stream; almost five hundred annually find their way into actual use in the United States alone. Among them are many that are used in man’s war against nature. Since the mid 1940’s over 200 basic chemicals have been created for use in killing insects, weeds, and other organisms described as "pests."
It is not my contention that chemical insecticides must never be used. I do contend that we have put poisonous and biologically potent chemicals indiscriminately into the hands of persons largely or wholly ignorant of their potentials for harm. We have subjected enormous numbers of people to contact with these poisons, without their consent and often without their knowledge. I contend, furthermore, that we have allowed these chemicals to be used with little or no advance investigation of their effect on soil, water, wildlife, and man himself. Future generations are unlikely to forgive our lack of concern for the integrity of the natural world that supports all life.
地球上生命的历史一直就是一部生物与其环境相互作用的历史。在很大程度上，地球上动植物的形态以及习性都是由外部环境所塑造的。考虑到地球上生命存在的整个时间，相反作用，即生命对其周围环境的实际改变作用，却相对很小。只有在当前这个世纪(指20世纪)才有一个物种--人类，获得了强大的力量，改变了其所生存的世界的自然状态。
在过去的1/4世纪中，这种力量不仅日趋强大，而且其性质也发生了变化。在人类破坏环境的种种行为中，最令人担忧的是人类向大气、土壤、河流以及海洋中排放危险甚至致命物质，而当今这种污染在很大程度上是无法挽救的。在当今这种对环境的普遍污染中，化学制品与辐射狼狈为奸，改变着地球的自然状态，也就是改变着地球上生命的自然状态。喷洒到农田、森林或者花园里的化学物质长期滞留于土壤中，渗入有机体内，并彼此相传，形成了一个中毒与死亡的链条。化学物质还神秘地通过地下水传递，最终以新的形式出现并结合，使植物毒死，牲畜害病，并使饮用一度纯净的井水的人遭受了不明之害。正如一位科学家所言：“人类甚至对自己创造的恶魔都不认识。”
地球历经了许多亿年才创造了栖息其上的生命。经过了一定时间--不是以若干年计而是以若干千年计的时间--生命开始适应环境，并形成了一种与环境的平衡。但是在现代世界中，时间这一因素已经没有了。
环境改变的速度不再顺从大自然从容不迫的节奏，而是顺从人类急切匆匆的步伐。辐射是当今人类通过支配原子而得到的一种非自然的创造物。化学制品则是人类有发明创造力的头脑创造出来的合成物，在自然界本无相应的东西。
为了适应这些化学制品，人类需要付出的时间不会只是一个人一生的时间，而是几代人的时间。而即使这样，就算出现奇迹成为可能，这种适应也是徒劳的，因为新的化学制品从我们的实验室中源源不断地涌出。仅在美国，每年就有大约500种化学制品投入使用，其中许多是用于人类对自然的战争中。从20世纪40年代中期起，人类已经创造了200多种基本化学制品用来消灭昆虫、野草以及其他所谓的“有害生物”。
我不是说人类决不能使用化学杀虫剂。我要说的是，我们不分青红皂白地将这些有毒的、具有强大生物功能的化学制品，交给了那些对这些制品的潜在危害基本上或者完全无知的人去使用。我们使众多的人接触这些有毒物质，却没有征得他们的同意，并常常将他们蒙在鼓中。我还要说的一点是，我们允许使用这些化学制品，却事先很少或者根本没有调查它们对土壤、水、野生生物以及人类自身造成的影响。我们缺乏对万物赖以生存的自然界生态统一的关心，对此，我们的后代是不可能原谅的。
科普类英语文章
基因技术能否使人更聪明?Get Smart
Many people dream of having a smarter brain. Princeton neurobiologist Joseph Z. Tsien found the key. In September he announced that he’d built a better mouse by altering a gene that affects learning and memory. A similar process of gene manipulation might conceivably be used one day to boost intelligence in humans.
The secret lies in a feature of brain cells called the nmda receptor, which Tsien likens[1] to a cylindrical tube or window that mediates[2] the flow of information. When the window is open, chemicals called neurotransmitters flow through easily and memory is registered and stored. But as organisms mature, the window begins to close. (This may explain why children lose their facility for learning new languages when they reach sexual maturity and why some people suffer memory loss as they age.)
Tsien noticed that the receptor worked more efficiently when teamed[3] with the gene NR2B, so he introduced extra NR2B genes into a batch of fertilized mouse eggs. In a normal mouse, the memory window is open for just 150-thousandths of a second. In Tsien’s specially engineered mice, the window opens for 250-thousandths of a second, long enough to make a remarkable difference in memory retention. When he pitted[4] his mice against common mice, they won paws down. Ordinary mice could recognize a Lego block for 12 hours, but smart mice could remember the block for up to three days. "That’s a profound enhancement," Tsien says.
Can it be done with humans? Maybe, but genetic engineering will have to make some extraordinary advances first. And some thorny ethical issues will have to be resolved. Meanwhile, Tsien promises to keep his furry little geniuses locked up in a lab, far from your larder. "Otherwise," he says, "you might need a smart cat or a smart mousetrap to catch them."
许多人都希望自己能变成更聪明。普林斯顿神经生物学家Joseph Z. Tsien就找到了这把开启智慧之门的钥匙：他于九月宣布，通过改变影响学习和记忆能力的基因培养出了一只聪明的老鼠。类似的基因处理技术有望在未来日子里运用到人脑，以推动人类智慧的飞跃。
该技术的奥秘就在于名为nmda感受器的脑细胞的功能。Tsien将其比作一个传递信息流的圆柱通道或窗口。当窗口开放时，某种称为神经传递素的化学物质就能轻易流过，记忆因此登记并存储了下来。然而，当器官成熟时，这扇窗口就开始关闭。(这也能解释为何 儿童 长大后(性器官成熟之时)会失去掌握新语言的能力，以及为何某些人年老时会患失忆)。
Tsien注意到，当感受器与名为NR2B的基因协作时效率会更高。因此，他将NR2B基因植入一批老鼠的受精卵中。一只普通老鼠的记忆之窗仅开放千分之150秒。而经Tsien植入基因的老鼠，记忆之窗能开放千分之250秒，这已经能够使其 记忆力 发生惊人的改变。当他让自己的老鼠与普通老鼠互斗时，它们竟能轻而易举地取胜。普通老鼠能够保留关于Lego block的记忆12小时，而聪明的老鼠居然能将记忆保持三天。“这可是一个意义深远的进步。”Tsien这样说。
那么，人类也能接受这种基因移植吗? 或许可以，但前提是基因工程得首先做出非凡的成就，还必须解决一系列棘手的伦理问题。Tsien保证他一定会将那些披着毛皮的小天才锁入实验室，远离人们的食品柜。“否则，”他说，“为了捉住他们，人们就不得不去寻找更聪明的猫或者功能更强的捕鼠器了。”
科普类英语文章
食用转基因食品安全吗?Food Safe To Eat?
Traditional plant breeding involve s crossing varieties of the same species in ways they could cross example，disease-resistant varieties of wheat have been crossed with high-yield wheat to combine these type of natural gene exchange is safe and fairly predictable.
Genetic engineering(GE)involves exchanging genes between unrelated species that cannot naturally exchange genes with each can involve the exchange of genes between vastly different species―― scorpion toxin genes into maize or fish antifreeze genes into is possible that a scorpion toxin gene，even when it is in maize DNA，will still get the organism to produce scorpion toxin――but what other effects may it have in this alien environment?We are already seeing this problem――adding human growth hormone genes to pigs certainly makes them grow――but it also gives them arthritis and makes them cross-eyed，which was entirely unpredictable.
It will be obvious，for example，that the gene for human intelligence will not have the same effect if inserted into cabbage DNA as it had in human DNA――but what side-effect would it have?In other words，is GM food safe to eat?The answer is that nobody knows because long-term tests have not been carried out.
Companies wanting a GM product approved in the UK or USA are required to provide regulatory bodies with results of their own safety ’s soya beans were apparently fed to fish for10weeks before being was no requirement for independent testing，for long-term testing，for testing on humans or testing for specific dangers to children or allergic people.
The current position of the UK Government is that“ There is no evidence of long-term dangers from GM foods.”In the US，the American Food and Drug Administration is currently being prosecuted for covering up research that suggested possible risks from GM foods.
传统的植物培育 方法 ，是依照植物自然杂交的方式，进行相同物种的人工杂交。比如，抗病小麦同高产小麦杂交，形成了一种具有双重特性的新的小麦品种。这种自然的基因交换既安全，又具有相当的可预见性。
基因工程是在彼此毫无关系的物种之间，相互交换在自然条件下无法交换的基因。它可在有巨大差异的物种之间进行基因交换。比如，将蝎子毒素基因注入玉米，或者将鱼防冻基因注入西红柿。即使在玉米DNA中，蝎子毒素基因依然可能获得有机组织产生蝎子毒素。但是在这种异质的环境中，这种基因产品会有什么其他作用吗?我们实际上已经发现这个问题：将人类生长荷尔蒙基因植入猪的体内，一定会使猪的生长加速，但是同时也使猪患上了关节炎和内斜视，而这一切是完全无法预测的。
打个比方，人类的智力基因显而易见在人体DNA内和注入卷心菜DNA后的作用是不同的。但将它植入卷心菜中会产生什么样的副作用呢?换句话说，食用转基因食品安全吗?没有人知道答案，因为人们尚未进行长期的测试。
在英国或者美国，一个公司如果希望其转基因产品获得批准，它必须向管理机构提供本公司转基因产品安全测试的结果。Monsanto的大豆在获得批准之前，曾用了10周时间进行喂鱼试验。目前，尚无要求对转基因产品进行独立测试、长期测试、人体测试，或者就其对儿童及过敏者所造成的特定危险进行测试。
英国政府目前的态度是：“尚无证据表明食用转基因食品存在长期性的危险。”在美国，人们正在起诉美国食品药品管理局掩盖转基因食品安全性的研究结果，这些研究结果表明，食用转基因食品可能导致危险。
Scientistsdiscoveredthat"junkDNA,"thebasepairsbetweenknowngenesinthehumangeneticstructure,.:科学家发现了"垃圾DNA,"在人类的遗传基因的结构已知的基因之间的恶劣双,扮演重要角色。一些研究队已经发现DNA在基因帮助决定之间如何精力充沛地和时常基因被刺激而且为蛋白质的生产塑造那个编码。
Chinese Holidays and Festivals Post By：2008-12-2 19:55:05 As well known, different countries have different customs and cultures. With the development of China, it has a rich and unique culture. The holidays and festivals in China are quite different from those in other countries. We have many traditional holidays and festivals. In addition, people in different areas also have their own local Year —元旦It falls on the first day of the year. It marks the beginning of a year. People will plan what to do in the new year. Because they believe that the whole year's work depends on a good start in Festival —春节Spring Festival is the most important festival in China. It is on the first day of the first lunar month(阴历正月). On the eve of the festival, people will paste spring poems(贴春联)with lucky words. They prepare delicious food, dumpling is a must. They also clean their house, but there is no sweeping on spring festival for people think it will sweep away good luck. People often come back home to enjoy family reunion, the whole family will get together for the big dinner. They also exchange greeting with other friends and Festival 元宵节It comes on the 15th of the first lunar month and it marks the end of the Spring Festival. On this day, people often eat sweet dumplings（元宵）for good luck. They will visit the display of lanterns(灯展)or go to temple fair(庙会)Qingming 清明节Qingming —It is also called Tomb-Sweeping Day. It falls on April 4th or 5th . That is a special day for the living to show love and respect to their dead friends or relatives. People often go to sweep the tomb and put the meat, wine in front of the tomb. One interesting thing is that people burn the paper money for the dead. Dragon Boat Festival 端午节This day is on the fifth of the fifth lunar month, People often get together to watch the wonderful “Dragon Boat Race”(龙舟大赛)，Rice Dumpling(粽子) is a must on Dragon Boat Festival. People eat Rice Dumpling in memory of the famous poet-屈原who died on this day many years Day —中秋It comes on the 15th of the eighth lunar month. People often gaze at the “Lady in the moon”(嫦娥) and eat moon cakes. The Mid-autumn Day also means harvest
Are the sun and the solar system to the sun as the center, dominated by its gravity and the objects around it sports posed by the system . Members include the sun, Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune, Ming Wang, more than 2000 asteroids 34 satellites, as well as a lot of comets and meteoroids. The sun (Sun) The center of the solar system objects. Are a star. Contains nearly 98% of the solar system quality. With the Earth's average Distance of 149,600,000 kilometers diameter 1,390,000 kilometers, to the Earth 109 times the volume of the Earth's million times, Ping Are the density of grams / cubic centimeter. Surface temperature of about 6000 degrees Celsius, the center temperature of 15 million degrees Celsius. By Nuclear fission of hydrogen nuclei into helium thermonuclear reaction a large amount of energy. The naked eye we see the surface layer called the "light ball" , Light balls above a layer called the "chromosphere", the most outer layer called the "corona", which formed the sun's atmosphere. Too Yang's rotation period is 25 days, the bipolar area is about 35 days, the sun on the most abundant chemical element hydrogen. The sun's activity stems from its central part. The sun's core pressure of more than 34 billion times the Earth. Here at hair Health of nuclear fusion. Fusion led to the four proton or a hydrogen atom or helium nuclei阿尔法粒子. Al Law on the quality of particles smaller than percent to four protons, the quality of the remaining energy is transformed into the sun and was released to the table Noodles, and through the process of emitting light and heat convection. Solar core, through millions of years of energy required to reach Its surface. Per second have been 700 million tons of hydrogen into helium. In the process, there are about five million tons of net energy Volume was released, so the sun can make light-emitting. Photosphere are the chromosphere above. Amount of solar power through the region from the center outward transfer. This layer can be seen too Yang flares. Flares sunspots are formed before the chromosphere the hydrogen generated by hot clouds. Photosphere at some Region, a slightly lower temperature than the surrounding (usually 4000 degrees Celsius), this is the sunspot. The sun's outer atmosphere called the corona. Date the region has bait. Date baits are the upper chromosphere at the enormous Flame. The most coronal extension of outer space-oriented and radiation generated by the particles from the sun. Coronal only have the whole day Can be seen when fresh. The sun's age of about 46 million years, it can continue to burn about 50 million years. At the final stage of its existence, too Yang will be in the helium into heavy elements, the sun will also be the beginning of the volume continues to expand, until the Earth swallowed. At 一亿年After the red giant stage, the sun will suddenly collapse into a white dwarf - all stars of the existence The final stage. Go through several万亿年, it will eventually completely cooled. Mercury (Mercury) Ancient China, also known as "辰星." The sun, one of the nine planets. From the sun recently. With solar distance Astronomical units, that is million kilometers in diameter for 38% of the Earth, mass of the Earth's , density of water times larger orbit eccentricity, . Revolution period of 88 days, the rotation period of 59 days. For The sun side of the temperature of 400 degrees Celsius, while the sun back to -160 degrees Celsius, Mercury has many craters on And has a strong magnetic field, the surface strength of 1% of the Earth. Shell by the porous soil, or similar surface soil of the moon rock Composed of stone powder. Mercury is even lower than Jupiter's satellite Ganymede (Ganymede) and Saturn's satellite Titan (soil Titan) is also small. Mercury surface similar to the lunar surface. Meteorite dust covered the ups and downs撞成hills, a few kilometers of the fault cliff high Stretching hundreds of kilometers, large and small craters are everywhere. Looks at the sun than the Earth on large two and a half times. Because of not enough air to scatter sunlight, the sky is usually dark. If you look up to the sky, he also Xu will find two bright stars: a bright yellow are the Venus, the other one is blue earth. On observations from the Earth, Mercury and the sun angle of the largest only 28 degrees at dawn or during the day it appeared in the sky , So its observation very difficult. In the "sailors" on the 10th visit the Mercury before the awareness of Mercury are Very small. Because of its revolution and rotation of the relationship between the more complex, if the sun to rise from the sun for a Down Units to calculate, on the day of Mercury will be the day the Earth 176. Mercury appears that it can not exist on the water, its atmosphere is very small, and very high temperatures during the day. However, in 1991 Mercury at the Arctic scientists found an unusual bright spot. Highlights the possible cause of this are at the surface Or underground ice. Because the orbit of Mercury is rather special, at its North Pole, the sun is always on the horizon only irresolute Further. At some of the internal crater may never see the sun because of the temperature dropped to -161 degrees Celsius . Such a low temperature is likely to solidification from the planetary internal release of gas, or accumulation of ice from space . Mercury atmospheric pitiful, its main components for helium (42%), Sodium vapor (42%) and oxygen (15%), and its The average surface temperature of 179 degrees Celsius, up to 427 degrees Celsius, a minimum of -173 degrees Celsius. Venus (Venus) Ancient China, also known as "Venus", "Chang", "Taibai", "star" and so on, the nine planets of the solar system 1. According to the order from the sun for the second. With an average distance of the sun astronomical units, 108,210,000 Km. Size and the Earth is similar to the diameter of the Earth smaller than 5%, quality 82% of the Earth, the density of water, 5 .2 Times the revolution period of 225 days, the rotation period is 243 days, the rotation direction and the other planets the contrary, the surface cover Covered a very thick atmosphere, the most carbon dioxide, oxygen and water vapor low surface temperature as high as 480 degrees Celsius About. Venus surface of the magnetic field only one-thousandth of the Earth also has an ionosphere. Separately in the morning because of Venus Morning and evening in the sky, the ancient astrologers have been think there are two such planets, then sub - Do not be referred to as the "Morningstar" and "evening." In English, Venus - "Venus" (Venus) is an ancient Romanian Horse of the god of love and beauty. It has always been curly clouds shrouded in mystery at. Because of Venus and the Earth in size, mass, density and weight on very similar, and almost all of Venus and the Earth Formed simultaneously by the same nebula, astrologers will have them as sister planets. But recently scientists have discovered , Venus and the Earth in fact very different. Venus has no oceans, it has been the main ingredients for a thick oxide Carbon in the atmosphere surrounded by water does not. Its cloud is composed of sulfuric acid droplets. At the surface, it Equivalent to atmospheric pressure at sea level on the Earth 92 times. Because of Venus's thick atmosphere of carbon dioxide caused by "greenhouse effect", Venus surface temperature up to 482 photo S degrees. Sunlight through the atmosphere will be hot roast Venus surface. Surface outward radiation of heat at the process by Atmospheric barrier, can not be distributed into outer space. This makes Venus than in Mercury also hot. Random surface of Venus is covered with many small craters. Because of Venus's thick atmosphere, a diameter less than 2 kilometers Crater is almost impossible to retain it. And when a large meteorite in a small pit formed before the meteorite hit the surface of Venus, and its production Health and debris at the surface of the crater produced exceptional group. Volcanoes and volcanic activity of a lot of the surface of Venus. To Less 85% of Venus surface covered with volcanic rocks. Many lava flows hundreds of kilometers, fill the lowland, forming a broad Wide plains. In addition to hundreds of large volcanoes, more than 100,000 small crater Block embellishment at the surface of Venus. From fire Mountain emitted lava flows resulted in a long trench, ranging up to hundreds of kilometers, one of a range of ultra - Over 7000 kilometers. The topography of Venus is covered with vast lava plains and mountains of geological activities undermine or plateau. At Maxwell Hill Ishtar region are the highest mountain on Venus. Aphrodite highland region occupies almost Half of the equatorial regions. Magellan plans to obtain more than kilometers of Venus images show the existence of the plateau zone prescribed Bright soil moist. However, in the Venus surface, liquid water are unlikely to exist, and could not explain the bright plateau Reasons. There was a presumption that these bright regions may be due to metal compounds. Studies have shown that this Some metals may be iron sulfide. It can not exist in the plain areas, but at high altitude is possible. These payments May also be an alien, and it led to the effect is the same, but the concentrations are lower. The Earth (Earth) The nine planets of the solar system, according to the order from the sun for the third stars, with the sun's average distance of about 14,960 10,000 kilometers, the volume of around 1,083,200,000,000 cubic kilometers for the equatorial radius is about 6378 kilometers, the radius is extremely 6,3 57 kilometers, a difference of 21 kilometers. The average water density is times the revolution period is days, the rotation cycle 2 3:56. Revolution of the Earth orbit is an ellipse with the Earth equatorial plane into 23 degrees 26 minutes angle. So generated The length of the seasons and day and night. Surface has a solid crust. An area of 51,100 km, one of the total marine table Area of 71%, land is about 29%, surrounded by the atmosphere, nitrogen, oxygen, water vapor and other gas components. Earth Has a satellite - the moon. Used to distinguish the characteristics of the Earth are on a black background and blue water, brown and green Land and the large white cloud. We are the Earth's atmosphere is 78 percent nitrogen, 21% are oxygen, the remaining 1 percent are other ingredients. Flat surface of the Earth Both the temperature is 15 degrees Celsius, the mean pressure of Pa. The Earth are the only known solar system planets existence of life. Express our planet's rotation and nickel iron lava nuclear Heart to generate a vast magnetic field, together with the atmosphere to prevent almost all from the sun and other stars Harmful rays. The Earth's atmosphere for us to block a lot of meteorites, meteorite much at their arrival and before the Had been burned. Since the beginning of human space exploration, our own planet there is a greater awareness. The first man-made human beings to Ball satellite discovered a strong radiation zone, now called the Van Allen radiation belts. The causes are from Sports Express in the charged particles in the equatorial region of a circular region to capture the Earth's magnetic field. Earth's magnetic field By the solar wind into a droplet-shaped twist of this phenomenon is also found by satellite. We also found that once we identified Is very calm for the upper atmosphere, they are very active, and it during the day and evening to narrow expansion. Live by the sun Dynamic effects of the Earth's upper atmosphere to affect weather and climate. Apart from the impact of the Earth's climate, the sun's activities are also our atmosphere for the brilliant performances. When the charged particle Son of the Earth's magnetic field has been captured, they are with our planet's pole impact air molecules so that these open air molecules Sending light, this is the "Aurora." Mars (Mars) Ancient China, also known as "荧惑," the nine planets of the solar system, according to the order from the sun for the fourth stars. And too Yang average distance astronomical units, or 227,940,000 kilometers in diameter for 53% of the Earth, its size at Ranked seventh in the solar system. Quality for 11 percent of the Earth, the density of water is times the revolution period of 687 days, Rotation cycle of 24 hours 37 minutes. Mars's equatorial plane and orbital plane 23 degrees 59 minutes into the corner, so on Mars also has Four Seasons, a quarterly basis and around six months long. Very thin atmosphere, mainly composed of carbon dioxide, the surface temperature at Chek Road during the day and the highest, at 28 degrees Celsius, down to -132 degrees Celsius at night, white极冠of the main components of water ice Also has a small amount of dry ice, the size of极冠changes with the seasons. Sometimes disappear in summer and winter increase. Surface Comparing the same as the Earth has rocks, volcanic and desert regions. On Mars because of the rock, sand and sky are red Color or pink, so the planet is often also referred to as the "red planet." The southern hemisphere of Mars are similar to the moon covered with craters of the ancient plateau, while the Northern Hemisphere, mostly organized by young plains Composition. Mars 24 kilometers high on the "Olympus" Mountains can be called the solar system are the highest mountains. Away from fire Stars around tens of thousands of kilometers, have two very small stars, which are the Martian satellites. In Chinese, the name is reminiscent of Mars to the "fire" and hot, but in fact, this red planet is Abnormal cold and dry. Nevertheless, Mars is still in the solar system and earth are the most similar to a planet. It Smaller than the size of the Earth, the atmosphere thinner than the Earth. A very thin atmosphere of Mars, the Earth's atmospheric pressure is only 7 thousandths. The main components of the atmosphere of Mars are dioxoketene CFCs, and other ingredients are nitrogen, argon, oxygen and so on. Mars atmospheric water at the proportion of only . Thus abnormal drying the surface of Mars. Mars the average temperature of minus 55 degrees Celsius, while the larger temperature difference: In the summer, daytime temperatures up to Twenty degrees Celsius, while in winter the temperature can be as low as minus more than 100 degrees Celsius. Mars often have strong winds, And thus often leads to large-scale dust storms. Scientists have found that many areas on Mars have been signs of erosion, but it seems to criss-cross the riverbed Telling us that Mars once had liquid water, they gather into large and small lakes, and even marine . Scientists, it was explained that at the early formation of Mars, the planet by thick clouds of carbon dioxide The parcels, resulting in a powerful "greenhouse effect" by the solar radiation, heat the surface of Mars have been obstructing the clouds Separated, can not be distributed to the outer space, making temperatures rise, so that liquid water to exist. At that time, the warmth of the Martian Humid, you may have been bred to life. Mars has two poles at many solid-state carbon dioxide (dry ice), scientists have speculated that in these enormous ice Cover may exist below the water-solid. Jupiter (Jupiter) Ancient China, also known as "岁星," one of the solar system planets. According to the order from the sun for the Fifth stars. And too Yang average distance of astronomical units, or 778,300,000 kilometers. Volume and quality than the other eight planets Combined, and the equatorial diameter of the Earth times for the thousand kilometers. The quality of the Earth's , Density of water times, public transfer cycle , the rotation cycle for the 9:50 is the fastest one rotation Stars, so the shape is very flat. Jupiter atmospheric shading shows staggered parallel to the equator of the cloud band, the temperature was about -12 1 degrees Celsius. Well-known Great Red Spot are embedded in the cloud band of clouds. Atmospheric thickness of about 730 kilometers. Atmospheric depths have Water vapor, but the total amount of less than hydrogen. There are acetylene, ethane and phosphine. Jupiter's magnetosphere has been a huge package Around with the Earth's magnetosphere similar to, but charged particles within the magnetosphere the energy of the radiation of the Earth is about one million times. Wood Stars than the Earth magnetic field strong 20-40 times, suggesting that Jupiter has its own energy. Jupiter has 13 satellites, consider someone There may be satellites fourteenth. There is a halo of Jupiter and Aurora
：天文学家发现一对中子星（中子星）在轨道上互相喷涌出光束的辐射。两个物体都是脉冲星（脉冲星） ，快速闪烁和关闭脉冲能量。一个是第二脉冲率44倍。通过学习辐射，天文学家希望第一时间了解中子星密度。
Scientistsdiscoveredthat"junkDNA,"thebasepairsbetweenknowngenesinthehumangeneticstructure,.:科学家发现了"垃圾DNA,"在人类的遗传基因的结构已知的基因之间的恶劣双,扮演重要角色。一些研究队已经发现DNA在基因帮助决定之间如何精力充沛地和时常基因被刺激而且为蛋白质的生产塑造那个编码。
身体健康是从物质意义对人的生活质量的理解。下面是我带来的 医学英语 科普 文章 ，欢迎阅读!
医学英语科普文章1
话说水果、蔬菜和疾病
Five-a-Day "No Benefit" 每日五份没效果
One of the most commonly-held beliefs regarding health and nutrition in the UK has beenfound to be untrue, according to a new scientific study.
For many years British people have been recommended to eat at least 'five-a-day' – that isfive items of fruit or vegetables every day in order to improve their health and reduce thelikelihood of illness, in particular cancer.
The recommendation was first put forward in 1990 by the World Health Organizationwhich said that the 'five-a-day' diet could prevent cancer and other chronic diseases.
Since then the advice has been a mainstay of public health policies in many developedcountries, such as the UK, where the population eat a high proportion of junk food.
Many health campaigns have promoted the advice, and indeed much food packaging inBritain states how the contents will constitute part of your five-a-day.
However, a study of 500,000 Europeans from 10 different countries refutes the commonly-believed suggestion that up to 50% of cancers could be prevented by increasing the public'sconsumption of fruit and vegetables.
Instead the study, which is led by researchers from a well-respected New York medicalschool, estimates that only of cancers could be averted by eating more fruit and veg.
It seems that the key to avoiding cancers is to have an overall healthy lifestyle whichincludes not smoking or drinking a lot of alcohol, taking exercise and avoiding obesity.
But medical charities have spoken out to remind people that diet is an important factor instaying healthy, and that even a reduction in cancers is still a positive step.
Cancer Research UK said: "It's still a good idea to eat your five-a-day but remember thatfruits and vegetables are pieces in a much larger lifestyle jigsaw."
医学英语科普文章2
致命的军团杆菌
legionnaires' disease is a serious and sometimes fatal form of pneumonia. legionnaires' disease is caused by infection with legionella bacteria which are found naturally in the environment and thrive in warm water and warm damp places. man-made water systems sometimes provide environments that let legionella bacteria increase to large numbers. these man-made systems include showers, spa pools, fountains, and air conditioning cooling towers. people usually get legionnaires' disease by breathing in mists that come from a water source contaminated with legionella bacteria.
an estimated 8,000 to 18,000 people get legionnaires' disease in the united states each year. some people can be infected with legionella bacteria and have mild symptoms or no illness at all. patients with legionnaires' disease usually have fever, chills, and a cough, which may be dry or may produce sputum. some patients also have muscle aches, headache, tiredness, loss of appetite, and, occasionally, diarrhea. from the time of infection with legionella bacteria, it takes 2-10 days for symptoms to appear. in most cases, symptoms begin after 5-6 days. legionnaires' disease is treated with antibiotics, such as erythromycin. the earlier that treatment is begun, the better the outcome.
the first known outbreak of legionnaires' disease was in philadelphia, usa, in 1976. a total of 221 people contracted the disease and 34 died. most of those that died were legionnaires and that's how the disease got its name. the second largest outbreak was at the stafford hospital in england in 1985; a total of 101 people contracted the disease and 28 died.
军团病是一种非常严重的、有时可以致命的肺炎。军团病是由军团杆菌引起，这种细菌产生在自然环境中，在温水里及潮热的地方蔓延。人工供水系统有时也能为军团杆菌的大量繁殖提供生存环境。这些系统包括淋浴器、矿泉池、喷泉以及空调设备的冷却水塔。人们通常是由于呼吸了被军团杆菌污染的水源散发的水雾而传染上军团病的。
据估计，在美国每年都有国每年都有8000~18000人感染上军团病。有些军团病感染者所表现出来的症状比较温和，甚至根本就没有得病的迹象。军团病患者通常有发烧、畏寒及干咳或咳痰等表现。部分患者还有肌肉疼痛、头痛、疲劳、食欲不振及偶尔腹泻等症状。这种病的潜伏期约为的潜天。许多病例表明，出现症状需要状需要5~6天的时间。军团病可以用红霉素等抗生素进行治疗，越早治疗效果越好。
军团病已知的首次爆发是在发是1976年美国费城，221人感染疾病，其中死亡34人。由于大多的死者都是军团成员，因此称为军团病。该病的第二次大爆发是1985年在英国的斯塔福德医院。这次101个被感染者中有28人死亡。
医学英语科普文章3
女性最佳生育年龄
For women who want to have children, planning the right time is a difficult decision. In recent years, many women have opted to put off having kids until their late 20s and well into their 30s — focusing on finishing school, building their careers, traveling, and maybe even paying down their student loans before taking the leap into parenthood. Statistics show that women are waiting longer and longer to have kids — the current average age of first-time moms is up to , up from just 15 years ago.
对于想要孩子的女性来说，合适的时间是一个艰难的决定。近年来，很多女性选择在20岁末甚至30多岁才要孩子，主要原因是她们忙于完成学业、发展职业生涯、旅行、甚至选择在为人父母之前偿还助学贷款。数据表明，女性的生育年龄越来越晚——生第一胎的平均年龄从15年前的岁上升到现在的是岁。
The choice to have children is extremely personal and of course there’s no wrong answer when it comes to being ready to be a mom. But according to Dr. Gillian Lockwood, medical director at the Midland Fertility Clinic in the UK, there is an ideal age when our bodies are best suited to pregnancy. Can you guess what it is?
要孩子的选择是一个非常私人的话题，选择什么时候做母亲都没有错。但是英国米德兰生育诊所的医学主任Gillian Lockwood表示，我们的身体有一个最佳的生育年龄。你能猜到是多少岁吗?
I’ll give you a hint: it’s when many of us have a quarter-life crisis. Also: when it finally becomes affordable to rent a car.
提醒一下：最佳的生育年龄是在大多数人的“青年危机”时，也是我们终于能租得起车的时候。
Yep. According to Lockwood, the ideal age to get pregnant is 25.
Lockwood表示，是的，最佳的生育年龄是25岁。
Unfortunately, says Dr. Lockwood, it’s also the age when motherhood is low on many women’s list of priorities. She explained in the Evening Standard:
Lockwood医生说，不幸的是，对很多25岁的女性来说，成为母亲并不在她们的优先任务清单上面。Lockwood医生在《伦敦标准晚报》上解释说：
“Age 25 is exactly the time when today’s young women have left university, are trying to get off on a good career, trying to pay back their student loans, trying to find someone who wants to have babies with them and trying to get on the housing ladder.”
“25岁的当代年轻女性刚刚大学 毕业 ，事业起步，忙于偿还助学贷款，找男朋友，努力买房。”
Dr. Lockwood also had some harsh words about fertility treatments being marketed as a viable option to women over 40. “The bleak reality is that the chance of IVF working with your own eggs once you are 40 is absolutely abysmal,” she said. “Would we let, yet alone encourage, patients to pay for an elective operation with a less than five percent chance of working?” While that may be Dr. Lockwood’s opinion, plenty of wannabe parents may be happy to take those chances.
Lockwood医生还批判了向40多岁女性推销不孕疗法的行为。“事实很残酷，如果你超过了40岁，用卵子进行体外受精的成功几率非常低，”她说。“谁会允许甚至鼓励病人做成功几率低于5%的择期手术?”这是Lockwood医生的观点，但仍有很多想要孩子的父母很愿意抓住这些机会。
It’s worth reiterating that there are so many factors that inform the choice to have kids and only you can decide when — and IF — you want to become a mother. Whether you choose to have kids at 20, 30, 40, or beyond; biologically, through a surrogate, or via adoption, always listen to your own body and make the decision that makes sense for your own life. You know what’s right for you.
特别强调的是，很多因素会影响要孩子的时间，只有你自己可以决定是否想成为一位母亲。不管你是在20岁、30岁、40岁甚至更大的年龄要孩子，是自己生、代孕还是收养，你都要听从自己的身体，做出对生活有意义的选择。你知道什么是最适合自己的。
s why more and more people are being active in various kinds of sports and exercises.
If people follow these three ways of keeping fit. Some practice shadowboxing and swordplay while others run. Every morning many people get up early and take much exercise.
First, block the flow of blood, and therefore should be given up, walk or dance to music. This strengthens the heart. They advise people to eat more fruit and vegetables and less meat such as beef and pork because meat contains more fat than poultry and fish.
Medical researchers have proved that what people eat affects their health, it is essential to do the following. Some play basketball or volleyball or table tennis? Different people may give different answers to this question. Unfortunately few people follow this advice. Through sports and exercise, people bee healthier and stronger;s health a great deal. Smoking and drinking alcohol injure one'. Fat can build up in the arteries. That'.
Getting rid of bad habits like *** oking and drinking alcohol is also an important way to keep healthy, reduces the chance of heart attack. Research shows that getting plenty of exercise make the heart beat faster and the lungs work harder. In my opinion, it is absolutely necessary to take some exercise every day, and cause a heart attack or stroke. In the afternoon, others go in for gymnastics or track events,there are also many people keen on sports, and helps lower blood pressureHow to Keep Healthy
Nowadays more and more people are concerned about their health. But how to keep healthy, they greatly improve their health, jog
All people in urban and rural areas will enjoy basic medical care and health services by increasing government responsibility and spending, we will also encourage greater participation of private capital from both home and abroad in the reform covers a wide range of subjects including insurance, drug manufacturing, distribution and supervision, and legislation of medical put into place basic medical and health care systems covering both urban and rural residents, and ensure that every resident has access to safe。
The disturbing phenomenon has caused wide social concern. There are several underlying causes behind it. Nowadays, people tend to care more about their health and expect a longer life span, thus causing a boom in medical treatment. People are willing to spend more money on health care. Some hospitals take advantage of this and offer patients more unnecessary physical examinations in order to make more profits. 令人不安的现象引起了广泛的社会关注。
有几个背后的原因。如今，人们更关心他们的健康，期望寿命更长，从而导致了医疗的繁荣。
人们愿意花更多的钱在医疗保健上。一些医院利用这一优势，为患者提供更多不必要的体检，以使更多的利润。
In my view, it's high time that urgent measures should be taken to improve the present situation. First, doctors should live up to patients' expectations and put saving people's lives above anything else. Second, the authorities should shoulder its responsibility to ensure that hospitals provide people with high-quality medical care at a reasonable price. 在我看来，现在应该采取紧急措施来改善目前的形势了。首先，医生应该对病人的期望值，并把人的生命放在其他任何东西上面。
其次，当局应承担起它的责任，确保医院为人民提供高质量的医疗服务，以合理的价格。
The disturbing phenomenon has caused wide social concern. There are several underlying causes behind it. Nowadays, people tend to care more about their health and expect a longer life span, thus causing a boom in medical treatment. People are willing to spend more money on health care. Some hospitals take advantage of this and offer patients more unnecessary physical examinations in order to make more profits.
令人不安的现象引起了广泛的社会关注。有几个背后的原因。如今，人们更关心他们的健康，期望寿命更长，从而导致了医疗的繁荣。人们愿意花更多的钱在医疗保健上。一些医院利用这一优势，为患者提供更多不必要的体检，以使更多的利润。
In my view, it's high time that urgent measures should be taken to improve the present situation. First, doctors should live up to patients' expectations and put saving people's lives above anything else. Second, the authorities should shoulder its responsibility to ensure that hospitals provide people with high-quality medical care at a reasonable price.
在我看来，现在应该采取紧急措施来改善目前的形势了。首先，医生应该对病人的期望值，并把人的生命放在其他任何东西上面。其次，当局应承担起它的责任，确保医院为人民提供高质量的医疗服务，以合理的价格。
Campus Life 有关校园生活的英语作文
Early in senior high school, we longed to be enrolled in a university. Now the dream has e true. But how do we college students like our campus life?
Certainly, some relish it, finding it colorful and rewarding. Besides study, they spend considerable amount of time improving themselves in various aspect. Yet others do not think much of their college life, thus do not benefit as much. In their eyes, the university is just a bigger high school. The only difference is that they have more time at their disposal without parents looking over their shoulder.
As to me, college life is ideal if only I have abundant books to read, some bosom friends to keep me pany, a couple of conscientious professors to instruct me, and an easy access to the Inter.
范文二：
My station in university campus inch territory, breathes and feels a here freshness. The university life like this started. The life four years time already the picture got down certainly has run the line, you along this path endless long journey, the university time will say regarding me will be fresh, the biography first time was far away the hometown, trod studies the road. I to the university life am fuzzy, after investigates many times, everybody is o characters ----- is bored to the university life feeling, perhaps has that a reason! Three years high school life is such intense stimulates. Recollected also a little is afraid, facing high school's intense sprint, diligently was admitted to a school dream of the university, everybody is the like this struggle, assaults the dream. At the present, steps into the university campus, studies the life has had the bored feeling.
DESIGN AND IMPLEMENTATION OF PRODUCTION PLANNING MANAGEMENT SYSTEM OF SURVEYING AND MAPPING PROJECTKEY WORDS: GIS,Design,Analysis,Application,Management,ProductionABSTRACT:With the development of photogrammetry and spatial information sciences, we have found many new methods to solve the technical problem in surveying and mapping project. But there is a little research on the project management. Traditional management method is plex and time-consuming. Now, we need use new technique to improve the management method for enhancing management level. Taking “National Western Surveying and Mapping Project on 1:50000 Topological Maps Blank Area” as an example, this paper focus on production planning management. The project is remarkable, not only the task and extent is tremendous, but also the staff and stuff are excessive. The Blank Area has atrocious weather and extreme hypsography. All of the conditions increase the project management difficulty. For reasonable planning and logical budget, we designed and realized a production planning management system to give the decision support to the managers. This paper studies the system'e69da5e6ba903233363533362s requirement *** ysis, system structure and function in . INTRODUCTIONNowadays, Geographical Information Systems(GIS) are powerful and useful as means of information, visualization and research tools(Quan Bao,2004). Most GIS sofare is more suited to providing limited types of output than as a tool to support, at anything other than a superficial level, tactical or strategic decision-making processes. To improve the usefulness of GIS as a decision support tool, o needs are apparent. First, decision-makers require methods that allow them to easily select alternatives across a number of relevant criteria. Second, it is necessary to explicitly recognize that most decision-making processes involve multiple participants. Since problem solving id often characterized by multiple and conflicting objectives, methods that contribute toward more a pletely aiding decision system are required.。
1.科学小常识作文400字 给你一支吸管，一支普通的用来喝果汁的吸管，再给你一个土豆，一个刚从菜市场买来的拳头大的土豆。请问：你能用吸管穿透土豆么？ 不能！--大概你会这样说。那么再给你一个辅助工具--杯子，情况又会怎么样呢？ 今天中午我在看科普杂志，看到一篇《用吸管穿透土豆》的文章。我觉得很不可思议。土豆是硬的，而那弱不禁风的吸管怎么能……想着想着，我想起了那句经典 广告词“一切皆有可能”。于是我便怀着扳倒这一说法与见证奇迹的心理，准备实验。说实话，我的内心矛盾极了，不过一大部分还是不可能。单眼见为实，再好奇心的驱使下，我找来了杯子，土豆，吸管。 我先将土豆架再杯子上，接着用右手四指紧抓吸管，再用大拇指扣紧吸管的顶端，最后用力扎下去--吸管霍然穿过土豆。 我不敢相信的揉了揉自己的眼睛，但眼前任然保持着吸管再土豆中优美的姿态。我任然不相信，联想到了魔术，它在提醒人们亲眼目睹也会有假象。我已经不相信我自己的眼睛了。我叫来了妈妈，她也不相信，但我们换了吸管，土豆，杯子，有实验了好几次，结果都是一样的，我不得不相信，这是真的。 后来我明白了这个实验的关键是：要用拇指扣紧吸管顶端。这样一来，被隔绝了空气流动的吸管变得异常坚硬，足以穿透土豆。 我不得不承认，实验前我的“想当然”有多么可笑。一直纤细的吸管真的有能力穿透一个土豆。 这小小的实验令我觉醒。人生中，有多少“不可能”，只存于脑中而不存于现实世界里。而我，又因为心中的“不可能”而错过了多少尝试的机会啊！ 当吸管穿透土豆时，它也穿透了我心中虽有的成见。科学就在身边，我们要学会试着相信！ 2.有趣的科学知识 一次科学课上老师给我们讲有关蚂蚁的知识，老师留给我们一个问题：蚂蚁为什么不会迷路呢？还让我们查一查试一试。 于是我从图书室借了一些书籍去查阅。书上说，蚂蚁从蚁穴出发到达目的地后，沿途会留下一些气味，返回蚁穴，用触角相互碰一下，通知其他的蚂蚁。我想小小的蚂蚁真的这么聪明吗？ 为了证实这个结论，我准备亲自动手试一试。我先准备了一个细小棍，在小棍的一头放上一个诱饵——小糖果。我把这个装置放在一个蚁穴附近。不一会儿，有一只蚂蚁出来探路了。我把他引上木棍后，他到达了糖果的地方，停下来用触角碰了碰又停下来像是在闻一闻。我赶紧将木棍截下一部分，当这只蚂蚁返回的时候，就在被截去的地方左转右转，就是找不到回家的路。过了一会儿，我又重复了一次试验，蚂蚁仍然没有找到回家的路。 我高兴极了，哈哈！我终于明白蚂蚁为什么不会迷路了？原来它们是根据气味来辨别方向的 3.科普（趣味）知识文章 立春过后，大地渐渐从沉睡中苏醒过来。 冰雪融化，草木萌发，各种花次第开放。再过两个月，燕子翩然②归来。 不久，布谷鸟也来了。于是转入炎热的夏季，这是植物孕育①果实的时期。 到了秋天，果实成熟，植物的叶子渐渐变黄，在秋风中簌簌②地落下来。北雁南飞，活跃在田间草际的昆虫也都销声匿迹③。 到处呈现一片衰草连天的景象，准备迎接风雪载途④的寒冬。在地球上温带和亚热带区域里，年年如是，周而复始。 几千年来，劳动人民注意了草木荣枯、候鸟去来等自然现象同气候的关系，据以安排农事。杏花开了，就好像大自然在传语要赶快耕地；桃花开了，又好像在暗示要赶快种谷子。 布谷鸟开始唱歌，劳动人民懂得它在唱什么：“阿公阿婆，割麦插禾⑤。”这样看来，花香鸟语，草长莺飞，都是大自然的语言。 这些自然现象，我国古代劳动人民称它为物候。物候知识在我国起源很早。 古代流传下来的许多农谚③就包含了丰富的物候知识。到了近代，利用物候知识来研究农业生产，已经发展为一门科学，就是物候学。 物候学记录植物的生长荣枯，动物的养育往来，如桃花开、燕子来等自然现象，从而了解随着时节推移的气候变化和这种变化对动植物的影响. 物候观测使用的是“活的仪器”，是活生生的生物。它比气象仪器复杂得多，灵敏得多。 物候观测的数据①反映气温、湿度等气候条件的综合，也反映气候条件对于生物的影响。应用在农事活动里，比较简便，容易掌握。 物候对于农业的重要性就在这里。下面是一个例子。 北京的物候记录，1962年的山桃、杏花、苹果、榆叶梅②、西府海棠、丁香、刺槐的花期比1961年迟十天左右，比1960年迟五六天。根据这些物候观测资料，可以判断北京地区1962年农业季节来得较晚。 而那年春初种的花生等作物仍然是按照往年日期播种的，结果受到低温的损害。如果能注意到物候延迟，选择适宜的播种日期，这种损失就可能避免。 物候现象的来临决定于哪些因素呢？ 首先是纬度③。越往北桃花开得越迟，候鸟也来得越晚。 值得指出的是物候现象南北差异的日数因季节的差别而不同。我国大陆性气候显著，冬冷夏热。 冬季南北温度悬殊，夏季却相差不大。在春天，早春跟晚春也不相同。 如在早春三四月间，南京桃花要比北京早开20天，但是到晚春五月初，南京刺槐开花只比北京早10天。所以在华北常感觉到春季短促，冬天结束，夏天就到了。 经度①的差异是影响物候的第二个因素。凡是近海的地方，比同纬度的内陆，冬天温和，春天反而寒冷。 所以沿海地区的春天的来临比内陆要迟若干天。如大连纬度在北京以南约广，但是在大连，连翘③和榆叶梅的盛开都比北京要迟一个星期。 又如济南苹果开花在四月中或谷雨节，烟台要到立夏。两地纬度相差无几，但烟台靠海，春天便来得迟了。 影响物候的第三个因素是高下的差异。植物的抽青、开花等物候现象在春夏两季越往高处越迟，而到秋天乔木的落叶则越往高处越早。 不过研究这个因素要考虑到特殊的情况。例如秋冬之交，天气晴朗的空中，在一定高度上气温反比低处高。 这叫逆温层。由于冷空气比较重，在无风的夜晚，冷空气便向低处流。 这种现象在山地秋冬两季，特别是这两季的早晨，极为显著，常会发现山脚有霜而山腰反无霜。在华南丘陵区把热带作物引种在山腰很成功，在山脚反不适宜，就是这个道理。 此外，物候现象来临的迟早还有古今的差异。根据英国南部物候的一种长期记录，拿1741到 1750年十年平均的春初七种乔木油青和开花日期同1921到1930年十年的平均值相比较，可以看出后者比前者早九天。 就是说，春天提前九天。 物候学这门科学接近生物学中的生态学①和气象学中的农业气象学。 物候学的研究首先是为了预报农时，选择播种日期。此外还有多方面的意义。 物候资料对于安排农作物区划，确定造林和采集树木种子的日期，很有参考价值，还可以利用来引种植物到物候条件相同的地区，也可以利用来避免或减轻害虫的侵害。我国有很大面积的山区土地可以耕种，而山区的气候、土壤对农作物的适应情况，有很多地方还有待调查。 为了便利山区的农业发展，开展山区物候观测是必要的。 物候学是关系到农业丰产的科学，我们要进一步加强物候观测，懂得大自然的语言，争取农业更大的丰收。 4.科学小常识作文 我读了《十万个为什么》后觉得这一套书很好，这套书有数学分册、物理分册、化学分册、动物分册、人体科学分册、地球科学分册、宇宙科学分册、环境科学分 册、信息科学分册、工程科学分册和索引资料分册。《十万个为什么》十分适合青少年，他里面有各种各样的问题和答案。比如说，为什么投掷硬币很多次后出现正 面和后面的次数大致相等的问题。在工作或学习过程中，肯定会有什么问题，应该多翻翻类似《十万个为什么》的书，现代科学的发展越来越迅猛，人们为了认识已 知世界所需要掌握的科学知识将越来越多。如果在新的历史条件下，愚昧落后，缺少起码的知识，就可能被一些假科学、伪科学所愚弄，陷入盲目和迷信。为此，我 必须加强学习，提高素质，用正确的科学思想、科学方法、科学知识和科学技术来揭穿形形 *** 的伪科学的真面目。 5.给我一篇有趣的科普文,快快快 有趣的科普文 人为何分出了男女两性？ 有的生物有13种性别，有的可以同性繁殖——— 大自然孕育了生物，生物在进化过程中慢慢地出现了性别。 从理论上讲，一种生物可以有多种性别。事实上，有种黏液霉菌就有13种“性别”。 但这些多性别的物种很稀有，大多数物种都只有雌性和雄性两种性别。 在澳大利亚的昆士兰州有一种蜥蜴，其种群中不曾发现过一个雄性，雌性不需要 *** 来受精，它们的卵在预定的时间分裂，然后便长成一只小蜥蜴，而所有以这种方式产生的蜥蜴都是雌性。 性在进化上究竟有什么好处？为什么大多数生物都选择了两性的繁殖方式？ 为什么性别一般只有雌性和雄性两种？早在1958年，对现代达尔文主义的创立有重大贡献的生物学家罗纳德.费舍尔在他的著作《自然选择的遗传学理论》中，就明确提出了这个问题。但这个问题在此后40多年的时间内都没有得到很好的解答。 在澳大利亚墨尔本举行的第19届国际遗传学大会上，温哥华英国哥伦比亚大学的进化生物学家莎莉.奥托教授发言说：“鸟类交配，蜜蜂交配，人类也交配，但是却无人知晓性别究竟是如何进化的。假如可以创造出能够自行繁殖的女性，为什么还要创造男性呢？无庸讳言，21世纪的今天，进化生物学家仍然没有走出性别进化的迷宫。” 性在进化上究竟有什么好处？雌性为什么愿意付出这“50%”的代价？ 许多生物，不需要雄性和雌性，照样可以代代相传。比如，细菌就是通过最简单的方式自我复制———一个变成两个，两个变成4个，依此类推。 通过无性繁殖而产生的个体，都是完全相同的“复制品”。 在只有两种性别且雌雄异体的生物中，一个个体要繁殖后代，就必须要与同种的异性个体进行交配。 性对于生物体本身并不是一件什么好事。对于雄性来说，他们要花费大量的时间和精力去寻找和讨好配偶，或为求偶而战，弄得伤痕累累乃至有生命危险。 对于雌性来说，有性生殖的结果使她们的基因只能有一半传给子女，而来自雄性的另一半未必就很优秀，说不定上当被一个孬种所勾引。如果她们采用单亲无性生殖，她们的基因就能百分之百地传下去。 至今还有几千种生物采用无性生殖，就避免了那“50%”的代价。但是在现今存在的几百万种动植物中，为什么绝大多数都采用有性生殖或者是有性和无性生殖相结合？它们的雌性为什么愿意付出这“50%”的代价？性在进化上究竟有什么好处护窢篙喝蕻估戈台恭郡？ 目前流行的观点认为，有性繁殖带来了基因重组，基因重组带来了无穷无尽的变异，而丰富的变异更有能力接受生存的挑战。 这有点像参加抽奖，单性生殖只是买了一张彩票，然后把它复印了许多次，复印得再多也不能增加中奖概率，而有性生殖却是买了许多不同号码的彩票，显然最有可能中奖。 两性的选择是基因组在“争斗”过程中进化妥协的结果？ 在两种性别的个体数目大致相等的情况下，某一个个体只能有一半的机会遇到异性的个体，从而在寻找异性个体的过程中往往要浪费不少时间和精力。 如果一种生物有很多种性别，假设有100种，而且这种生物的个体只要找到与己不同性别的个体就可以进行交配生殖；在这种情况下，对于某一个个体来说，每100个其他个体中就有约99个是异性个体，从而它可有99%的机会遇到异性的个体。这样，每一个个体都可以只用较少的时间和精力就能达到有性生殖的目的。 既然只有两种性别降低了物种延续的概率，那生物为什么大多只有两种性别呢？近年有人提出了一种比较合理的解释，认为这是基因组“争斗”的进化妥协结果。 基于在一般的有性生殖中，都有通过不同性别的生殖细胞融合，重新组合起成为一个整体，来源于不同细胞的线粒体基因组或叶绿体基因组为了各自的利益、为了更多地复制，就有可能会产生一些可以“消灭”来自另一个细胞的线粒体或叶绿体的变异。 这种细胞器官的“互相残杀”将会导致整个细胞的灾难。为了使有性生殖能顺利进行，生物进化必须产生出一种能避免发生细胞内“战争”的方式。 最简单的解决办法就是形成只有两种性别的有性生殖体系，其中一种性别放弃把细胞质的遗传物质传给下一代的机会，而另一种性别则享有把细胞质的遗传物质传给下一代的权利。 今天的两性制度，也许正是以前多性制度垮台之后的结果。 那种有13种性别的黏液霉菌又如何呢？深入的研究发现，这13种性别并不是平等的。同样为了防止线粒体之间的战争，存在着一个等级森严的制度：比如说，第13号的性可以跟任何别 *** 配，在交配时只有它能够遗传下线粒体基因，其它的性必须抛弃自己的线粒体；对于第12号的性来说，只有在跟11号或者低于11号的别 *** 配时，才有保留线粒体基因的特权；依次类推。 可见如果只有一性，或者有两个以上的性，反而让有性生殖变得复杂起来，不如只有两性那么简单明了。在黏液霉菌中，低一号的性有时会发生突变，拒绝抛弃自己的线粒体，其结果是跟与之交配的高一号的性同归于尽。 如果这样的造反持续下去，等级森严的制度最终会垮台，性别的种类会越来越少，直到只剩下两种性。也许，今天的两性制度，正是以前多性制度垮台之后的结果。 相关链。 6.科学小常识作文 今天我又多了一件新的、十分好玩的玩具，想知道它是怎么来的吗？我来告诉你们吧！这个小玩具叫七彩光纤灯，是星期六我们在小牛顿班科学实验班制作的，下面我来给大家讲一下有关光导纤维的小知识吧！ 光导纤维的作用很多，各种各样，在电话、电视中都能找到它，光纤通信电视机可以当作电视传真电话使用，通话时，你可以看到我，我也可以看到你。传真电话也可用于电视教学，现在大多数教学中，只能教师在电视中上课，学生在电视前收看，相互不能提问。如果采用光纤“双向性”电视，就像老师在教室里和学生面对面上课一样了。减少了老师与学生无法交流的困难，真是方便极了。 你们想知道医生是怎么检查胃病的吗？我来告诉你们答案吧！那是用光导纤维制成的仪器插入人的胃中，电脑上就能显示出这个人胃里的情况。如果遇到疑难杂症，还还可以进行电脑会诊呢。张老师对我们说：“在以后的这些年中，光导纤维这项新技术前途无限广阔，它的应用将更加灿烂。” 老师还教我们制作了七彩光纤灯，先把七彩光管用两根导线和电池连在一起，然后拿出一把光导纤维把它的一头插在一个小管子的一端，另一头朝上立起来，把七彩发光管也 *** 小管中就做好了。把开关打开，七彩发光管照射着光导纤维上，顿时一根根发出明亮的光，不停地变化着颜色，七彩缤纷美丽极了。 我喜欢小牛顿班这些神奇、有趣的科学知识，更喜欢这个好玩的玩具——七彩光纤灯。 7.科普（趣味）知识文章 立春过后，大地渐渐从沉睡中苏醒过来。 冰雪融化，草木萌发，各种花次第开放。再过两个月，燕子翩然②归来。 不久，布谷鸟也来了。于是转入炎热的夏季，这是植物孕育①果实的时期。 到了秋天，果实成熟，植物的叶子渐渐变黄，在秋风中簌簌②地落下来。北雁南飞，活跃在田间草际的昆虫也都销声匿迹③。 到处呈现一片衰草连天的景象，准备迎接风雪载途④的寒冬。在地球上温带和亚热带区域里，年年如是，周而复始。 几千年来，劳动人民注意了草木荣枯、候鸟去来等自然现象同气候的关系，据以安排农事。杏花开了，就好像大自然在传语要赶快耕地；桃花开了，又好像在暗示要赶快种谷子。 布谷鸟开始唱歌，劳动人民懂得它在唱什么：“阿公阿婆，割麦插禾⑤。”这样看来，花香鸟语，草长莺飞，都是大自然的语言。 这些自然现象，我国古代劳动人民称它为物候。物候知识在我国起源很早。 古代流传下来的许多农谚③就包含了丰富的物候知识。到了近代，利用物候知识来研究农业生产，已经发展为一门科学，就是物候学。 物候学记录植物的生长荣枯，动物的养育往来，如桃花开、燕子来等自然现象，从而了解随着时节推移的气候变化和这种变化对动植物的影响. 物候观测使用的是“活的仪器”，是活生生的生物。它比气象仪器复杂得多，灵敏得多。 物候观测的数据①反映气温、湿度等气候条件的综合，也反映气候条件对于生物的影响。应用在农事活动里，比较简便，容易掌握。 物候对于农业的重要性就在这里。下面是一个例子。 北京的物候记录，1962年的山桃、杏花、苹果、榆叶梅②、西府海棠、丁香、刺槐的花期比1961年迟十天左右，比1960年迟五六天。根据这些物候观测资料，可以判断北京地区1962年农业季节来得较晚。 而那年春初种的花生等作物仍然是按照往年日期播种的，结果受到低温的损害。如果能注意到物候延迟，选择适宜的播种日期，这种损失就可能避免。 物候现象的来临决定于哪些因素呢？ 首先是纬度③。越往北桃花开得越迟，候鸟也来得越晚。 值得指出的是物候现象南北差异的日数因季节的差别而不同。我国大陆性气候显著，冬冷夏热。 冬季南北温度悬殊，夏季却相差不大。在春天，早春跟晚春也不相同。 如在早春三四月间，南京桃花要比北京早开20天，但是到晚春五月初，南京刺槐开花只比北京早10天。所以在华北常感觉到春季短促，冬天结束，夏天就到了。 经度①的差异是影响物候的第二个因素。凡是近海的地方，比同纬度的内陆，冬天温和，春天反而寒冷。 所以沿海地区的春天的来临比内陆要迟若干天。如大连纬度在北京以南约广，但是在大连，连翘③和榆叶梅的盛开都比北京要迟一个星期。 又如济南苹果开花在四月中或谷雨节，烟台要到立夏。两地纬度相差无几，但烟台靠海，春天便来得迟了。 影响物候的第三个因素是高下的差异。植物的抽青、开花等物候现象在春夏两季越往高处越迟，而到秋天乔木的落叶则越往高处越早。 不过研究这个因素要考虑到特殊的情况。例如秋冬之交，天气晴朗的空中，在一定高度上气温反比低处高。 这叫逆温层。由于冷空气比较重，在无风的夜晚，冷空气便向低处流。 这种现象在山地秋冬两季，特别是这两季的早晨，极为显著，常会发现山脚有霜而山腰反无霜。在华南丘陵区把热带作物引种在山腰很成功，在山脚反不适宜，就是这个道理。 此外，物候现象来临的迟早还有古今的差异。根据英国南部物候的一种长期记录，拿1741到 1750年十年平均的春初七种乔木油青和开花日期同1921到1930年十年的平均值相比较，可以看出后者比前者早九天。 就是说，春天提前九天。 物候学这门科学接近生物学中的生态学①和气象学中的农业气象学。 物候学的研究首先是为了预报农时，选择播种日期。此外还有多方面的意义。 物候资料对于安排农作物区划，确定造林和采集树木种子的日期，很有参考价值，还可以利用来引种植物到物候条件相同的地区，也可以利用来避免或减轻害虫的侵害。我国有很大面积的山区土地可以耕种，而山区的气候、土壤对农作物的适应情况，有很多地方还有待调查。 为了便利山区的农业发展，开展山区物候观测是必要的。 物候学是关系到农业丰产的科学，我们要进一步加强物候观测，懂得大自然的语言，争取农业更大的丰收。
在日常学习、工作抑或是生活中，大家都不可避免地会接触到作文吧，作文是从内部言语向外部言语的过渡，即从经过压缩的简要的、自己能明白的语言，向开展的、具有规范语法结构的、能为他人所理解的外部语言形式的转化。为了让您在写作文时更加简单方便，下面是我帮大家整理的科普小知识作文3篇，欢迎大家分享。
暑假，老师带我们来到体育馆，观看了一次有趣的科普展。
走进体育馆，我看到好多稀奇古怪的景象。咦，那是什么呀，一个水龙头源源不断的流出水来，却没供应给它水管的接头。我看见介绍，才知道水里隐藏着一根透明的水管。啊！原来那根水管才是供应水龙头里的水呐，这叫“无源之水”。我最喜欢的是“海市蜃楼”。我站在一米外，朝前面看，有一个弹簧悬在空中，我好奇地伸出手去摸，竟什么也摸不到，那就是“海市蜃楼”啊！
我又看见有一扇很大的屏风。上面有很多奇特的图案，最引人注目的是一个大脑袋上有两个人，下面写到这幅有9张脸，据说全找到的智商有180。我好奇地区看，不少老师也来。唉，我只找着三张脸，而咱们的语文老师马老师在背后指指点点，不一会儿便找着9长脸，真不愧是老师！
还有很多好玩，有趣的东西，我一路走走停停，说说笑笑，看同学们在用手触摸大话筒“怒发冲冠”；听同学们弹电子琴的“哆来咪”；感受同学们的欢声笑语，我的收获真的很多。
依依不舍地走了，我想科学的进步真是特别快，越来越让我着迷了。也让我们知道有些事情不能太迷信，要相信科学，科学能带领我们探索许多未知的秘密。
我觉得这次科普展很有意义。
我们所居住的地球，如同人类的母亲一样，大部分时间是和蔼可亲的。春天，鸟语花香；夏天，烈日高照；秋天，凉风习习；冬天，白雪皑皑。然而，“地球妈妈”一旦发怒起来，就会造成毁灭性破坏。为了让我们在灾难面前沉着冷静机智地应对，学校组织开展了有趣的科普活动。
首先，我们观看了一部科普电影。电影里的一些场景使我终身难忘：当海啸爆发时，猛烈的海潮就像一头凶猛的巨狮朝岸上的建筑扑去；当地震来临时，房屋先是剧烈地晃动，接着瞬间墙倒屋塌，一片狼藉；当火灾来临，熊熊大火如同猛兽吞噬着周围的一切。
接下来我们排着整齐的队伍来到操场，参加“穿越火线”活动。工作人员介绍说：只要钢环绕着钢杆走到终点，互相不碰触，就算胜利。如果钢环碰触钢杆，就会发出警报，警报声一响，就代表游戏失败。看似简单的游戏，实际上拼的是心理素质。当我小心翼翼拿着钢环慢慢地绕着钢杆行走时，手的一个小颤抖，钢环就被钢杆吸引过去了，警报声响起，我失败了。紧接着，后面一个个的都失败了。到最后，我们班刘旺同学不负众望，凭着他得沉着冷静赢得了成功。
今天的科普活动，我不仅学到了海啸、地震、火灾发生的一些原理常识，还学会了如何正确应对这些灾难以及灾难面前如何逃生的本领，收货可真大呀！
今天,我正在聚精会神哦写作业,忽然,传来一阵“嗡嗡”的`声音,我抬头一看一只蜜蜂正在我的对面悠然自得地哼小曲呢!我素来很怕蜜蜂,连忙叫爸爸来为我“除害”。
爸爸听见我叫他,急急忙忙地过来,问我:“什么事? ”我指了指蜜蜂说:"把它弄掉,太可怕了。”爸爸说：“看把你给吓的，你如果不去招惹它，它是不会轻易地攻击你的。”我奇怪了，说：“为什么呢?”爸爸说：“因为蜜蜂如果蛰了你，它屁股后面的刺就会带着内脏一起拉出来，它也会活不成。”我一听，来了兴趣，说：“让我看看它屁股后面的刺是什么样的吧?”“好。”
爸爸扯了一点餐巾纸猛地朝蜜蜂一拈，蜜蜂还没反应过来就成了爸爸的猎物，在爸爸手中无力地挣扎。爸爸拿着它，把它头朝下拿着，指着它屁股上那一伸一缩的刺，说：“这就是它的毒刺，只要把它拔了，蜜蜂很快就会死的。”说罢，爸爸趁蜜蜂再次把刺刺出时，一拉，那刺带着一个黄色的东西出来了。我问：“那是不是它的内脏呀?”爸爸说：“对，现在它已经没有抵抗能力了，把它放了吧!”我点点头。爸爸一松手，它就吃力地飞出去了。
我通过这件事又懂得了不少知识,原来科学真是无处不在呀!
在日常生活或是工作学习中，大家对作文都不陌生吧，写作文是培养人们的观察力、联想力、想象力、思考力和记忆力的重要手段。还是对作文一筹莫展吗？下面是我为大家整理的科普小知识作文4篇，欢迎大家分享。
我们所居住的地球，如同人类的母亲一样，大部分时间是和蔼可亲的。春天，鸟语花香；夏天，烈日高照；秋天，凉风习习；冬天，白雪皑皑。然而，“地球妈妈”一旦发怒起来，就会造成毁灭性破坏。为了让我们在灾难面前沉着冷静机智地应对，学校组织开展了有趣的科普活动。
首先，我们观看了一部科普电影。电影里的一些场景使我终身难忘：当海啸爆发时，猛烈的海潮就像一头凶猛的巨狮朝岸上的建筑扑去；当地震来临时，房屋先是剧烈地晃动，接着瞬间墙倒屋塌，一片狼藉；当火灾来临，熊熊大火如同猛兽吞噬着周围的一切。
接下来我们排着整齐的队伍来到操场，参加“穿越火线”活动。工作人员介绍说：只要钢环绕着钢杆走到终点，互相不碰触，就算胜利。如果钢环碰触钢杆，就会发出警报，警报声一响，就代表游戏失败。看似简单的游戏，实际上拼的是心理素质。当我小心翼翼拿着钢环慢慢地绕着钢杆行走时，手的一个小颤抖，钢环就被钢杆吸引过去了，警报声响起，我失败了。紧接着，后面一个个的都失败了。到最后，我们班刘旺同学不负众望，凭着他得沉着冷静赢得了成功。
今天的科普活动，我不仅学到了海啸、地震、火灾发生的一些原理常识，还学会了如何正确应对这些灾难以及灾难面前如何逃生的本领，收货可真大呀！
今天,我正在聚精会神哦写作业,忽然,传来一阵“嗡嗡”的声音,我抬头一看一只蜜蜂正在我的对面悠然自得地哼小曲呢!我素来很怕蜜蜂,连忙叫爸爸来为我“除害”。
爸爸听见我叫他,急急忙忙地过来,问我:“什么事? ”我指了指蜜蜂说:"把它弄掉,太可怕了。”爸爸说：“看把你给吓的，你如果不去招惹它，它是不会轻易地攻击你的。”我奇怪了，说：“为什么呢?”爸爸说：“因为蜜蜂如果蛰了你，它屁股后面的刺就会带着内脏一起拉出来，它也会活不成。”我一听，来了兴趣，说：“让我看看它屁股后面的刺是什么样的吧?”“好。”
爸爸扯了一点餐巾纸猛地朝蜜蜂一拈，蜜蜂还没反应过来就成了爸爸的猎物，在爸爸手中无力地挣扎。爸爸拿着它，把它头朝下拿着，指着它屁股上那一伸一缩的.刺，说：“这就是它的毒刺，只要把它拔了，蜜蜂很快就会死的。”说罢，爸爸趁蜜蜂再次把刺刺出时，一拉，那刺带着一个黄色的东西出来了。我问：“那是不是它的内脏呀?”爸爸说：“对，现在它已经没有抵抗能力了，把它放了吧!”我点点头。爸爸一松手，它就吃力地飞出去了。
我通过这件事又懂得了不少知识,原来科学真是无处不在呀!
暑假，老师带我们来到体育馆，观看了一次有趣的科普展。
走进体育馆，我看到好多稀奇古怪的景象。咦，那是什么呀，一个水龙头源源不断的流出水来，却没供应给它水管的接头。我看见介绍，才知道水里隐藏着一根透明的水管。啊！原来那根水管才是供应水龙头里的水呐，这叫“无源之水”。我最喜欢的是“海市蜃楼”。我站在一米外，朝前面看，有一个弹簧悬在空中，我好奇地伸出手去摸，竟什么也摸不到，那就是“海市蜃楼”啊！
我又看见有一扇很大的屏风。上面有很多奇特的图案，最引人注目的是一个大脑袋上有两个人，下面写到这幅有9张脸，据说全找到的智商有180。我好奇地区看，不少老师也来。唉，我只找着三张脸，而咱们的语文老师马老师在背后指指点点，不一会儿便找着9长脸，真不愧是老师！
还有很多好玩，有趣的东西，我一路走走停停，说说笑笑，看同学们在用手触摸大话筒“怒发冲冠”；听同学们弹电子琴的“哆来咪”；感受同学们的欢声笑语，我的收获真的很多。
依依不舍地走了，我想科学的进步真是特别快，越来越让我着迷了。也让我们知道有些事情不能太迷信，要相信科学，科学能带领我们探索许多未知的秘密。
我觉得这次科普展很有意义。
科技馆这周是“大型人体奥秘科普展”，今天上午我们三口一起来到了科技馆参观。
一进展厅，映入眼帘的是一幅幅画及各种标本，我们随着人流慢慢向前移动，睿拉着我的手说害怕，我和她爸爸鼓励她，但是看到人体各种器官时，还真觉得是那么神秘，尤其是看到正常人肺和吸烟人肺时，那鲜明的对比真的十分可怕。让睿最感兴趣的是胎儿的形成，从胚胎到7个月的胎儿怎么形成的，都展现在眼前。我们让睿了解了人体各种器官的结构和功能，虽然有些地方听得似懂非懂，至少也学了点自我保护的常识，也知道要从小要养成健康的生活习惯。
篇一：科学真科学能造福人类,伪科学会贻祸一方。我们学科学,是为了促进人类的进步,所以要抱有一颗善良的和谐的心,保持一份淡然的平和心态去面对科学,善待科学,用好科学。最后,希望所有人都能爱科学,学科学,用科学,只要我们勤奋学习,永不言弃就会得到真科学。一个个奇思妙想让“不可能”变成了现实，这就是人类对科学知识的聪明利用。所有的科学家都是从小发明走想大发现的，科学的大门永远向爱探索的孩子们敞开。同学们，你也试试，把不可能变成可能，让我们的生活更精彩！走进科学，科学界中有许多妙不可言的事情，观察气象，收集标本，科学实验，科普活动，生活发现等都是探索科学的一种，人类因科学而进步，科学因人类而创新，人类离不开科学，科学也离不开人类。篇二：科普小论文我们的地球也应该叫做水球，因为我们生活的这个地球有71%的表面积被水占着。地球是个非常璀璨的蓝色星球，它拥有的水量非常之巨大，总量为亿立方千米。其中，在海洋里；在冰川、冻土、雪盖中，是固体状态；在地下；余下的，分散在湖泊、江河、大气和生物体中。因此可以说，从天空到地下，从陆地到海洋，到处都是水的世界。水在阳光的照耀下，不断蒸发弥漫在上空，其中一部分水汽被气流带到陆地上空，变成水滴、变成云朵、变成雨或者雪降落到地面上。地球上的水，虽然说数量很大，但是淡水却少得可怜，可以给人类使用的水也没有多少。海水又咸又苦，不能饮用，不能浇地，也难以用于工业，淡水也只占总水量的左右，其中的绝大部分被冻结在远离人类的南北两级和冻土中，无法利用，只有不到1%的淡水，它们散布在湖泊里、江河中和地底下。与全世界总水体比较起来，淡水量真如九牛一毛。篇三：过河不拆桥每个人的肚子上都长着一个凹进去的小坑，由于它长的像眼睛，人们就称它为“肚脐眼”，你注意过这个小小的肚脐眼吗？你嫌弃过这个小坑难看过吗？我曾嫌弃过它，不过今天我了解它的历史，我再也不望恩负义了。当我们还在妈妈肚子里的时候，我们便已经有了这个肚脐眼了，不过当时还多一根脐带，这根脐带就是帮我们输送“食物”的，我们就像监狱里的犯人，等着狱卒送东西，而这个狱卒就是脐带，虽然我们那时都已经长有嘴巴，但是却不能够吃饭，那时如果真的不进食我们也同样会“饿死”，而我们现在称的“肚脐眼”就帮了我们，因为我们的脐带是和妈妈连在一起的，它就帮助我们把营养送进我们的肚子，那根脐带就像草的茎，把营养输进了我们的肚子，让我们在妈妈的肚子里成长。可我们现在的脐带怎么没有了呢？只留下一个光秃秃的肚脐眼坑，原来我们一出生后就被医生给剪掉了，因为他已经没用了，如果不剪掉，你也就出不来了。从今以后我再也不嫌肚脐眼长得丑了。
大海的呼唤 对人类来说，大海与人们的生活密切相关。那广阔的中所蕴含的生物、矿物、及空间资源等都是我们无法想象的，它给我们的生活带来的价值更是无法估量的。海洋对我们人类的生活是极其重要的。海洋是的故乡、生命的摇篮、资源的宝库、人类生存与发展的“第二空间”。随着世界经济发展、科技进步和人民生活水平的不断提高，人类对资源的需求，人口、资源、进一步加剧，的研究，利用、保护和管理以及海洋教育已受到各国普遍重视。海洋中含有丰富的资源。、海资源、、以及海上交通皆对人类的生存发展和世界文明的振兴进步产生重大的影响。自古以来，人类对就极其投入，随着世界的不断深入和陆地资源的日趋匮乏，开发利用日益成为今后世界新的潮流。近些年来，人类对海洋的认识和开发利用的成就是以往任何时期都无法比拟的。海洋的多种资源和产生的巨大经济效益越来越引起人类的关注，实践证明，海洋是人类生产和生活不可缺少的领域，海洋对人类的影响随着时间的推移将会成倍的增长，海洋是人类社会持续发展的希望所在，正像众多专家预言的一样，未来世纪是人类的海洋世纪。除了蕴藏丰富的以外，辽阔的海域还是交通的通道、防御外敌入侵的，开发利用海洋、发展海洋事业与人类的文明发展息息相关。大力发展，是解决、资源、环境压力最现实、有效的途径之一。首先，传统的业在现代科技条件下有了新的发展。在世界上各种方式的运输中，起着主导作用，海洋为此提供了无数条不用维修的“天然铁路”。不仅间往来大多依赖于船舶，而且近岸海洋在运输上也功不可没。成本低、运量大，如今的容量可达50万吨以上，当这种以15海里／小时的速度在海上航行时，相当于1万节满载的火车皮同时在轨道上奔驰。其次是开发海上的生产、生活空间。诸如海上、海上工厂、、海上走廊、海上牧场、、海上、等。科学家预测，最迟到21世纪末，人类将有十分之一的人口移居海洋城市。第三是海洋中和海底空间的开发利用。如在海底铺设电缆、建设海中隧道、、水下航行、海底以及海洋合理倾废场等。海水还是含有多种可开发利用的元素的液体。其中溶解着近80种元素，陆地上的天然元素在海水中不仅几乎都存在，而且有17种元素是陆地上所稀少的。现代技术已能对海水中溶解的卤素以及镁、钾等资源提炼制备。预计在21世纪中对海水中大部分资源特别是、锂、氚的研究将取得新的突破，从而为新提供燃料。海洋对人类的生活的重要性是不可小视的，但是，海洋被污染已威胁着人类的生存。1举办“”之际，联合国的专家发布，在当今的世界上，还有14亿人在饮用不安全的水，每年因此致病死亡的超过500万人。在我国，经济建设大发展后，大部分河流已受到不同程度的污染。别的国家也是工业越发达，海洋的污染越严重。被污染的大气经过流动扩散，可以很快稀释冲谈；被污染的水虽也可以流动，但常存在于相对稳定的水体中，对以水为生的人和生物的影响，长远而深刻。 造成固然有自然的因素。但工业的发展，化肥、农药以及生活中大量化学制品的使用，才使海洋中的污染发展到今天的危害程度。 排出的废水，和农业退水已成为今天的主要。水中污染物包含金属、非金属物质和有机物，种类繁多，其中许多对人体有害甚至是剧毒，虽然经过人工处理可以将它净化，但现在多是仅稍作处理，甚至是未经处理就直接排入体中。 绝大数河流最终都是流入海洋的，不管是有害的，还是无害的物质都随河流向海洋集中；破裂或沉没，会把严重污染海洋的石油带进海里。在一些地方，人们还向海里倾。海洋本是自然界的和自净池，有些人却在把它当成污水池和垃圾桶。靠近工业发达地区的地中海，早已无可言，很多物种已在此绝灭。我国的渤海由于周围城市的扩大和工业的兴起，也出现了这种发展趋势，据监测部门在1998年报告，1995年时，渤海已有56%的面积被污染，比十年前扩大了一倍，而且还在扩大。河流、湖泊、海洋这些水体本来都有自净化作用，所以大自然中的水总是那样晶莹清澈，现在受到污染而且还在发展，完全是不慎造成的后果。海洋是一个系统，污染物随着水的运动在其中传播，所以在南极企鹅的组织中也发现了；而波及广大海域的则来自。这些污水富含生物营养所需的磷、氮等元素和有机物。是因一些红色或褐红色藻类得到丰富营养，迅速生长、数量激增的现象。由于它们过量的繁殖，并在死亡后腐败、消耗大量氧气，影响到其他生物，使它们无法生存。大海是人类最亲密的朋友。行动起来吧，让我们一起保护大海，开发大海，着我们！
科普在我身边科普,在科技高速发展的现在,这是个很流行的词汇.没错,我认为科普就在我的身边.科普,全程科学普及.爱因斯坦、霍金、比尔·盖茨是我们心目中的明星，计算机科学、现代物理和化学动态更是无时不牵动着我们。我们已经明白科技的重要性，也知道了科技的普遍性。回望文明的历程，是科技之光扫荡了人类历史上蒙昧的黑暗，是科学之火点燃了人类心灵中的熊熊的希望；科技支撑了文明，科技创造着未来，而未来在我们手中。让我们成为知识的探索者，让我们在未知的道路上漫游，让我用我们的创造力将我们居住的世界变得更美好。 我们班的王泽宇同学在国际发明展上获得了大奖,切实证明了科普就在我们身边.记得很久以前，手机的用途几乎只有一个，那就是打电话，可是前几年，手机有了很大的改变，不仅外观漂亮多了，而且用途也多了，可以用手机拍照、开会、上网、发短信息等等一系列的事情，这让我们的生活更为方便，也让我更加领会到了科技的力量，不过，我只是个初出茅庐的学生，对“科技”二字的内容还知之有限，我无法用一些很深奥的理论来阐述科技的玄奇，也无法对各位走上工作岗位的长辈们承诺我所能实现的科技蓝图。但我愿意用一个学生的角度来畅想科技与未来。