人的记忆力会随着岁月的流逝而衰退，写作可以弥补记忆的不足，将曾经的人生经历和感悟记录下来，也便于保存一份美好的回忆。大家想知道怎么样才能写一篇比较优质的范文吗？接下来小编就给大家介绍一下优秀的范文该怎么写，我们一起来看一看吧。
六级完型填空答案篇一
a lazy youth, a lousy age. 以下是小编为大家搜索整理的'2017下半年英语六级阅读完型填空模拟练习，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
plastics are materials which are softened by heat and set into lasting form when shaped in a mold. some are natural; some are semi-synthetic(半合成的) , the result of chemical action on natural substance; some are synthetic, built up from the constituents of oil or coal. all are based on the chemistry of carbon, with its capacity for forming chains. the molecules that compose them (monomers) link together in the setting or curing(硫化) process to form chains (polymers) , which give plastics their flexible strength. some plastics retain their ability to be softened and reshaped; like wax, they are thermoplastic. others set permanently in the shapes they are given by heat and pressure; like eggs, they are thermosetting.
from industrial beginnings in the nineteenth century, plastics have struggled through a hundred and twenty years of glory, failure, disrepute and suspicion on the slow road to public acceptance. now, at last, one can positively say that plastics are appreciated and enjoyed for what they are; that they make modern life richer, more comfortable and convenient, and also more fun. plastics are warm materials, sympathetic to the human touch, and their transformation into things that come into contact with human beings is entirely appropriate.
the fact that there are plastic antiques comes as a shock to most people. how can a material that seems so essentially twentieth century, and one that is so much associated with cheap, disposable products, has a history at all? it is a young technology, and a great part of the fun of collecting plastics is that beautiful pieces of historical interest can still be found very cheaply.
21. the word "sympathetic" in paragraph 2 most probably means_______.
a. harmful b. agreeable
c. pitiful d. sorry
22. it can be concluded from this passage that_______.
a. plastics are synthetic materials
b. plastics won public acceptance 120 years ago
c. plastics are very harmful in modern life
d. plastics are cheap as antiques
23. which of the following is essential to create any type of plastics?
a. carbon. b. eggs.
c. oil. d. coal.
24. plastics that harden into permanent shapes are called_______.
a. chained b. thermoplastic
c. synthetic d. thermosetting
25. which of the following is the best title for the passage?
a. the importance of plastics in the nineteenth century.
b. why people are suspicious of plastics.
c. the development of plastics as a modern material.
d. how plastics are manufactured.
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