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  3. Graphene’s Superstrength Big technology comes in tiny packages. New cell pho...

Graphene’s Superstrength Big technology comes in tiny packages. New cell pho...

admin2020-12-24  6
问题 Graphene’s Superstrength
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. Engineers are looking for creative ways to build these components, and they’ve turned their eyes to graphene (石墨烯），a superthin material, made of carbon, which could change the future of electronics.
This year’s Nobel Prize for Physics has been awarded to Andre Geim and Kostya Novoselov from the University of Manchester, UK for the discovery of graphene. Graphene isn’t just small, it，s “the thinnest possible material in this world,” says Novoselov. He calls it a “wonder material”. It’s so thin that you would need to stack (堆放）about 25，000 sheets just to make a pile as thick as a piece of ordinary white paper. If you were to hold a sheet of graphene in your fingers，you，d have no idea because you wouldn't be able to see it.
Carbon is one of the most abundant (充足的)elements in the universe. Every known kind of life contains carbon. Graphene is a sheet of carbon，but only one atom (原子）thick. You don't have to look far to find graphene 一 ifs all around you.
If you want this high-tech wonderstuff, all you need is a pencil, paper and a little adhesive tape (胶带） Use the pencil to shade a small area on the paper, and then apply a small piece of adhesive tape over the area. When you pull up the tape, you’ll see that it pulls up a thin layer of some of the shading from your pencil. That layer is called graphite (石墨)，one of the softest minerals in the world.
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 wouldn’t be able to see it. Graphite is made of layers of graphene, so when you get to the thinnest possible layer, you，ve found graphene.
Which of the following statements about graphene is true?
选项 A It is visible to the human eye.
B It can be used to make paper.
C Finding it demands time and money.
D It is possibly the thinnest material in the world.
答案D
解析根据第二段中间一句：it’s “the thinnest possible material in this world”.从第二段最后 一句可以看出，人们看不见graphene。从第三段可以看出，graphene在宇宙中随处可见。 至于graphene被用来造纸，文中没有提到。
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