第四部分：閱讀理解（第31~45題，每題3分，共45分）

下面有3篇短文，每篇短文后有5道題。請根據(jù)短文內(nèi)容，為每題確定1個最佳選項(xiàng)。

第一篇

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, a superthin material, made of carbon, that 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 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 elements in the universe. Every known kind of life contains carbon. Graphene is a sheet of carbon, but only one atom thick. You don't have to look far to find graphene—it's all around you.

If you want this high-tech wonderstuff, all you need is a pencil, paper and a little adhesive tape. 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'11 see that it pulls up a thin layer of some of the shading from your pencil. That layer is called graphite, 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.

31. What would change the future of electronics according to engineers?

A. Personal computer.

B. Big technology.

C. Graphene.

D. Creative ways.

【答案】：C

32. Which of the following statements about graphene is true ?

A. It is visible to the human eye.

B. It is possibly the thinnest material in the world.

C. It can be used to make paper.

D. Finding it demands time and money.

【答案】：B

33. The word “apply” in paragraph 4 could be used to replaced by ?

A. push.

B. find.

C. collect.

D. put.

【答案】：D

34. What does the writer tell in the last two paragraph ?

A. An easy way to find graphene.

B. Significance of the discovery of graphene.

C. Development of high-tech wonders.

D. Possible applications of graphene.

【答案】：A

35. Graphene's super strength lies in the fact that.

A. It is the thinnest material in the world.

B. It is made of the most abundant elements in the world.

C. It can help to make electronic components smaller.

D. It helps engineers to produce more sensitive electronic products.

【答案】：C

（責(zé)任編輯：vstara）

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