方法:首段概述:这是一个好的理想,但绝对来之不易 分段议论: 要付出汗水; 要好的方法; 要踏实虚心; 结尾:这样,有朝一日,才可能成为一名科学家 爱迪生与弗兰克林(121字) ================================ Thomas Edison and Benjamin Franklin ================================ Thomas Edison lived from 1847 to 1931; he is most famous for inventing the light Benjamin Franklin lived from 1706 to 1790, and he is credited with discovering Both men were inventors, and both were born in the United S As children, both Franklin and Edison had limited Both inventors are said to have self-taught themselves mostly through their love of Franklin and Edison were both interested in electricity, and I think they would have had a lot to talk about if they had ever met face-to- They were different too They lived in very different While Benjamin Franklin discovered Edison‘s inventions and discoveries all required electrical currents: light bulbs, microphones, phonographs, fluoroscopes, In ancient times, many people believed the earth was a flat Well over 2,000 years ago; the ancient Greek philosophers were able to put forward two good arguments proving that it was Direct observations of heavenly bodies were the basis of both these First, the Greeks knew that during eclipses of the moon the earth was between the sun and the moon, and they saw that during these eclipses, the earth's shadow on the moon was always round, they realized that this could be true only if the earth was spherical, If the earth was a flat disc, then its shadow during eclipses would not be a perfect circle; it would be stretched out into a long The second argument was based on what the Greeks saw during their They noticed that the North Star, or Polaris, appeared lower in the sky when they traveled south, in the more northerly regions, the North Star appeared to them to be much higher in the By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 000 stadium, that's the plural of the world Today, it's not known exactly what length one stadium represents, but let's say it was about 200 meters, the length of many athletic This would make the Greeks estimate about twice the figure accepted today, a very good estimate for those writing so long before even the first telescope was