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15年职称英语理工类AB级考点重点复习笔记 2008年教材上新增了大约17篇文章，词汇选项，阅读判断， 概括大意完成句子， 阅读理解， 补全短文， 完型填空各个题型上都有新增文章。理工类和卫生类新增的文章更体现专业性。新增文章的语言难度和问题考点设置情况在一定程度上反映了08年考题的出题趋势。 The Tiniest Electric Motor in the World 1. Scientists recently made public the tiniest electric motor ever built. You could stuff hundreds of them into the period at the end of this sentence. One day a similar engine might power a tiny mechanical doctor that would travel through your body to remove your disease. 2. The motor works by shuffling(来回运动) atoms(原子) between two molten metal droplets(小滴) in a carbon nanotube(纳米管). One droplet is even smaller than the other. When a small electric current is applied to the droplets, atoms slowly get out of the larger droplet and join the smaller one. The small droplet growsbut never gets as big as the other dropletand eventually bumps into the large droplet. As they touch, the large droplet rapidly sops up (吸入)the atoms it had previously lost. This quick shift in energy produces a power stroke(动力行程). 3. The technique exploits the fact that surface tension -- the tendency of atoms or molecules to resist separating -- becomes more important at small scales. Surface tension is the same thing that allows some insects to walk on water. | 
