Question

15．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．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 of plastic itself．The research team found a way to make plastic that contains very small balloons filled with monomer（單體） liquid．When the new plastic cracks，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．
33．The passage mainly talks aboutA．
A．plastic that repairs itself               
B．the chemical structure of plastic
C．permanent material invented           
D．small balloons that makes plastic stronger
34．We know from the passage that the repair is done asB．
A．the cracked plastic parts are changed    
B．the plastic cracks
C．the liquid is put into the plastic cracks    
D．the plastic is made
35．The scientists are planning to use the new material in space vehicles，bridges and people becauseA．
A．the plastic parts in them are required to last longer
B．they want to experiment in these places first
C．the new material cannot be used elsewhere
D．the plastic parts in them are easily broken or damaged．

Answer 1

分析 本文是一篇科教類閱讀，美國(guó)科學(xué)家已經(jīng)開發(fā)出第一種材料可以自我修復(fù)，材料是塑料的一種形式，在其表面工程填補(bǔ)了．今天在每方面都使用塑料，科學(xué)家們想找到一種方法使塑料可以持續(xù)更長(zhǎng)時(shí)間，塑料制成的研究人員希望他們的新發(fā)現(xiàn)可以被用來使之成為可能．

解答 33．答案：A．主旨大意題．根據(jù)全文內(nèi)容，尤其是"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．"可知，本文主要講述了自我修復(fù)的塑料．故選A．
34．答案：B．細(xì)節(jié)理解題．根據(jù)"When the new plastic cracks，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．"可知，液體進(jìn)入塑性裂縫時(shí)，修復(fù)完成．故選B．
35．答案：A．細(xì)節(jié)理解題．根據(jù)"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．"可知，其中的塑料部件需要持續(xù)時(shí)間更長(zhǎng)．故選A．

點(diǎn)評(píng) 本文是一篇科教類閱讀，題目涉及多道細(xì)節(jié)理解題．主旨大意題．做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文，把握文章主要內(nèi)容，聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義，從中選出正確答案，一定要做到有理有據(jù)，切忌胡亂猜測(cè)