四六级论文模板范文参考

Directions: For this part, you are allowed 30 minutes to write a short essay entitled On Excessive Packaging following the outline given below. You should write at least 120 words but no more than 180 words.

四六级作文模版 写作模板——提纲式作文 1． 对立观点式 A．有人认为X 是好事，赞成X， 为什么？ B． 有人认为X 是坏事， 反对X，为什么？ C．我的看法。 Some people are in favor of the idea of doing X. They point out the fact that 支持X 的第一个原因。They also argue that 支持X 的另一个原因。 However, other people stand on a different ground. They consider it harmful to do X. They firmly point out that 反对X 的第一个理由。 An example can give the details of this argument: 一个例子。 There is some truth in both arguments. But I think the advantages of X overweigh the disadvantages. In addition to the above-mentioned negative effects it might bring about, X also may X 的有一个坏处。 2． 批驳观点式 A．一个错误观点。 B． 我不同意。 Many people argue that 错误观点。By saying that, they mean 对这个观点的进一步解释。An example they have presented is that 一个例子。（According to a survey performed by X on a group of Y, almost 80% of them 赞成这个错误观点或者受到这个错误观点的影响）。 There might be some element of truth in these people’s belief. But if we consider it in depth, we will feel no reservation to conclude that 与错误观点相反的观点。There are a number of reasons behind my belief. (以下参照辩论文的议论文写法)。 3． 社会问题（现象）式 A．一个社会问题或者现象。 B． 产生的原因 C．对社会和我们生活的影响 D． 如何杜绝。（如果是问题的话） E． 前景的预测。 Nowadays, there exists an increasingly serious social/economic/environmental problem. (X has increasingly become a common concern of the public). According to a survey, 调查内容说明这种现象的情况。（或者是一个例子）。 There are a couple of reasons booming this problem/phenomenon. 下面参照辩论式议论文的写法。 X has caused substantial impact on the society and our daily life, which has been articulated in the following aspects. 参照辩论式议论文的写法。 A dozen of measures are supposed to take to prevent X from bringing us more harm. 参照辩论式议论文的写法。 Based on the above discussions, I can easily forecast that more and more people will …….. 写作模板——图表式作文 It is obvious in the graphic/table that the rate/number/amount of Y has undergone dramatic changes. It has gone up/grown/fallen/dropped considerably in recent years (as X varies). At the point of X1, Y reaches its peak value of …(多少). What is the reason for this change? Mainly there are … (多少) reasons behind the situation reflected in the graphic/table. First of all, …(第一个原因). More importantly, …(第二个原因). Most important of all, …(第三个原因). From the above discussions, we have enough reason to predict what will happen in the near future. The trend described in the graphic/table will continue for quite a long time (if necessary measures are not taken括号里的使用于那些不太好的变化趋势). 英语四六级写作试题模板——辩论式议论文 模版1 Some people believe (argue, recognize, think) that 观点1. But other people take an opposite side. They firmly believe that 观点2. As for me, I agree to the former/latter idea. There are a dozen of reasons behind my belief. First of all, 论据1. More importantly, 论据2. Most important of all, 论据3. In summary, 总结观点. As a college student, I am supposed to 表决心. 或 From above, we can predict that 预测. 模版2 People hold different views about X. Some people are of the opinion that 观点1, while others point out that 观点2. As far as I am concerned, the former/latter opinion holds more weight. For one thing, 论据1. For another, 论据2. Last but not the least, 论据3. To conclude, 总结观点. As a college student, I am supposed to 表决心. 或 From above, we can predict that 预测. 模版3 There is no consensus of opinions among people about X（争论的焦点）。Some people are of the view that 观点1，while others take an opposite side, firmly believing that 观点2。As far as I am concerned, the former/latter notion is preferable in many senses. The reasons are obvious. First of all, 论据1。 Furthermore, 论据2。 Among all of the supporting evidences, one is the strongest. That is, 论据3。 A natural conclusion from the above discussion is that总结观点。 As a college student, I am supposed to 表决心. 或 From above, we can predict that 预测.

模板？ 有啥用啊。不如把听力听好

第一段： Nowadays there remains an increasing interest in the topic about/concerning…… The meaning of the saying seems that……  现在人们对这个话题越来越 感兴趣了…… 这句话的意思似乎是…… 第二段： There exist a sea of elements to explain my viewpoint. Although so abundant cases can support my simple view, the following one is most favorable.(接下来要举支持自己观点的例子)…… According to an investigation by the department of social science in an esteemed university, an increasing amount of the opinion that…… 存在着大量的元素来解释我的观点。尽管如此丰富的情况下可以支持我的简单的看法，以下是最有利的。 根据一所尊敬的大学社会科学系的调查，越来越多的人认为…… 第二段中能用的万能状语： In the general routine of everyday living, In light of the rapid advance of science and technology…… It is universally acknowledged that…… 在日常生活的日常生活中，随着科学技术的飞速发展…… 全世界都知道…… 第三段： It is really high time that we pay attention into the fact that……(题目中提出的主题，可以自己再发挥点) Awareness about something could be cultivated to make ourselves lend a healthy and favorable life. Only by taking these action can people have a more brilliant and glorious future. People from different backgrounds would put different interpretations on the same case. In the last decades, advances in mobile Internet technology have made it possible for people to enjoy the more convenient life style. 这是真的时候，我们注意到这样的事实，...... 对某事的认识可以培养，使我们能过上健康和良好的生活。只有采取这些行动，人们才能拥有更加辉煌灿烂的未来。 不同背景的人对同一件事会有不同的解释。 在过去的几十年里，移动互联网技术的进步使人们可以享受更便捷的生活方式。

排放冷却是对流冷却的另一种。与再生冷却不同，用于排放冷却的冷却剂对推力室冷却吸热后不进入燃烧室参与燃烧，而是排放出去。直接排放冷却剂会降低推力室比冲，因此需要尽可能减少用于排放冷却的冷却剂流量，同时只在受热相对不严重的喷管出口段采用排放冷却。还有一种是辐射冷却，其热流由燃烧产物传给推力室，再由推力室室壁想周围空间辐射散热。辐射冷却的特点是简单、结构质量小。主要应用于大喷管的延伸段和采用耐高温材料的小推力发动机推力室。在组织推力室内冷却时，是通过在推力室内壁表面建立温度相对较低的液体或气体保护层，以减少传给推力室室壁的热流，降低壁面温度，实现冷却。内冷却主要分为头部组织的内冷却（屏蔽冷却）、膜冷却和发汗冷却三种方法。推力室采用内冷却措施后，由于需要降低保护层的温度，所以燃烧室壁面附近的混合比不同于中心区域的最佳混合比（多数情况下采用富燃料的近壁层），造成混合比沿燃烧室横截面分布不均匀，使燃烧效率有一定程度的降低。膜冷却与屏蔽冷却类似，是通过在内壁面附近建立均匀、稳定的冷却液膜或气膜保护层，对推力室内壁进行冷却，只是用于建立保护层的冷却剂不是喷注器喷入的，而是通过专门的冷却带供入。冷却带一般布置在燃烧室或喷管收敛段的一个横截面上。沿燃烧室长度方向上可以有若干条冷却带。为提高膜的稳定性，冷却剂常常经各冷却带上的缝隙或小孔流入采用发汗冷却时，推力室内壁或部分内壁由多孔材料制成，其孔径为数十微米。多孔材料通常用金属粉末烧结而成，或用金属网压制而成。此情况下，尽可能使材料中的微孔分布均匀，是单位面积上的孔数增多。液体冷却剂渗入内壁，建立起保护膜，使传给壁的热流密度下降。当用于发汗冷却的液体冷却剂流量高于某一临界值，在推力室内壁附近形成的是液膜。当冷却剂流量低于临界值流量时，内壁温度会高于当前压力下的冷却剂沸点，部分或全部冷却剂蒸发，形成气膜。除了以上热防护外，还有其他热防护方法如：烧蚀冷却、隔热冷却、热熔式冷却以及室壁的复合防护等。3 高焓气体发生器热防护方案综合上述方法结合实际情况，便得到高焓气体发生器的热防护方法。高焓气体发生器的燃烧室与液体火箭发动机的不同，省去前面的推力室部分，使得其结构更简单而有效。那么，所涉及到的热防护即为对燃烧室室壁的热防护部分。由于燃料进入燃烧室内迅速分解并放出大量