职称英语理工类阅读理解最后练习(2)

　　Graphenes Superstrength1 　　Big technology comes in tiny packages. New cell phones and personal computers get smaller every year，which means these electronics require even smaller components on the inside. 　　This years Nobel Prize for Physics3 has been awarded to Andre Geim and Kostya Novoselov from the University of Manchester4，UK. for the discovery of graphene. Graphene isnt just small, 　　Carbon is one of the most abundant elements in the universe. Every known kind of life contains carbon. Graphene is a sheet of carbon，but only one atom thick. You dont have to look far to find grapheme -its all around you. 　　Now stick the same piece of tape on another sheet of paper and pull the tape up -there should be an even thinner layer，this time left on the paper. Now imagine that you do this over and over，until you get the thinnest possible layer of material on the paper. This layer would be only one atom thick，and you wouldnt be able to see it. Graphite is made of layers of graphene，so when you get to the thinnest possible layer，youve found graphene. 　　graphene n.石墨烯 　　atom n.原子 　　stack v.使成堆，堆放 　　注释： 　　2. superthin：超薄。见注释1。 　　4. the University of Manchester：曼彻斯特大学。这是一所位于英国曼彻斯特市的公立研究型大学，创建于1851 年。 　　6. wonderstuff：神奇物。该词为合成词，由wonder和stuff两个词构成。 　　7. apply a small piece of adhesive tape over ：将一小片胶带敷在上。 　　1 .What would change the future of electronics according to engineers? 　　B Creative ways. 　　D Both A and B. 　　A It can be used to make paper. 　　C It is easy to find graphene. 　　3. Which of the following can be used to replace the word applyin paragraph 4? 　　B polish. 　　D put. 　　A Graphene is made of graphite，one of the softest materials in the world. 　　C When we get to the thinnest possible layer of graphite，we find graphene. 　　5. Graphenes superstrength lies in the fact that 　　B It is made of the most abundant elements in the world. 　　D It helps engineers to produce more sensitive electronic products. 　　1. C 第一段最后一句提供了答案：工程师将眼光投向石墨烯，一种由碳原子组成的超薄材料， 　　2.C 第二段倒数第二句告诉我们，25,000 层石墨烯才能堆砌成一张普通白纸的厚度，这是为了说明石墨烯是多么的薄，而不是说它可以用来造纸，所以A不是正确答案。第三段最后一句说明石墨烯就在我们周围，因此C是答案。B和D的表述内容都与该两段内容不符合。 　　4.A 最后两段告诉我们，用一张纸，一支铅笔和一片胶带就能找到石墨烯;无数层石墨烯构成石墨，当铅笔留在纸上的石墨被胶带剥离到最薄一层时，我们就得到了石墨烯。因此只有A不是最后两段的表述内容。