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成人英语三级知识点:阅读模拟one

2018年02月06日 11:02:05来源:成人英语三级考试网
导读:备考成人英语三级考试的伙伴们醒醒,起来做题啦。今天小编带来的是一些2018年的阅读模拟试题,学到手的都是知识点啊,希望同学们放假也不要太放松啊,要学会合理安排学习与生活时间!

>>成人英语三级模拟题:成人英语三级知识点:阅读模拟one

>>成人英语名师全程辅导课程

American scientists have developed the first material that repairs itself. The material is a form of plastic that has been engineered to fill breaks in its surface. Plastics are used today in everything from airplane wings to hundreds of object found in the home. Scientists wanted to find a way to make objects made of plastic last longer. The researchers hope their new discovery can be used to make objects that are difficult or impossible to replace. The surface of plastic objects breaks over time. Very small breaks develop every time a plastic object is used. The researchers wanted to find out how to stop plastic from developing small breaks that weaken and destroy it. They found the answer in the chemical structure(构造)of plastic itself. Plastic is made of monomers(单体). These monomers link together to form polymers(聚合物). Polymers give plastic its ability to be shaped and its strength. The research team found a way to make plastic that contains very small balloons filled with monomer liquid(液体). When the new plastic cracks(裂开), the monomer liquid is let out and flows into the crack. Thus the break is repaired. The repaired plastic has seventy – five percent of the strength of undamaged plastic. The new self – repairing plastic is not yet ready for production. But it has several possible uses. One could be in space vehicles where parts cannot be repaired or replaced. Another possible use might be in bridges. And it could be used in people, to replace bone joints that have become broken or damaged.

1.Which of the following can be the best title for the article?

A.Ever – Lasting Material Invented. B.The Chemical Structure of Plastic.

C.Plastic that Repairs Itself. D.Small Balloons that Makes Plastic Stronger.

答案:C

2.We know from the passage that the repair is done as .

A.the cracked plastic parts are changed B.the plastic is made

C.the liquid is put into the plastic cracks D.the plastic cracks

答案:D

3.The scientist are planning to use the new material in space vehicles, bridges and people because .

A.the plastic parts in them are required to last longer B.the plastic parts in them are easily broken or damaged

C.the new material cannot be used elsewhere D.they want to experiment in these places first

答案:A

4.What can we know about the new material talked about in the passage?

A.It is a kind of liquid that is commonly used. B.It is more difficult to make than common plastics.

C.Its surface does not crack so easily as other ones. D.It makes it difficult or impossible to replace plastic objects.

答案:B

敲重点啦,上面内容可是包含成人英语三级知识点啊,同学们都理解掌握了吗。登录坦途网成人英语考试频道,为你提供更多成人英语三级模拟试题,让你获得答题技巧,助你取得一个好成绩。

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