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20.People often call the plastic bags"white pollution".(71)B,it becomes the worst invention for the human.It is reported that it takes 100-200years to break down the plastic bags completely.However,a 16-year-old high-school Canadian student called Daniel Byrd discovered the way to break down the plastic bags!
The idea of the invention comes from his housework.(72)E.Every time,when he opens the closet,the plastic bags fly out.This makes him very angry.(73)A.With his teacher's help,he found that when he put the two germs(细菌) mixture up and that made the plastic bags break down quickly.
He made an experiment first.He put some earth germs and plastic bags together.After 12weeks,he found the plastic bags had been broken down.(74)C.The experiment also showed that the plastic bags could be broken down in three months.And they only gave out some water and little carbon dioxide (CO2).
Now Byrd has got 30thousand dollars from his invention.(75)D He has also got a lot of award from many universities.
A.So he thinks how to deal with these plastic bags
B.Because it is hard to break down
C.Then he made another experiment
D.He wants to go to college with his money
E.He always helps her mother do the housework

分析 这篇短文主要讲述环保问题.文章介绍人们常常把塑料袋的"白色污染",而且很难被化解,加拿大的一名高中生丹尼尔通过实验发明了一种能让塑料袋化解的办法.这也让他获得了许多奖金.

解答 答案:71.B  细节推理题.根据上下文People often call the plastic bags"white pollution".人们常常把塑料袋的"白色污染".It is reported that it takes 100-200 years to break down the plastic bags completely.据悉,这需要100-200年才能完全分解塑料袋.可知结合选项,应是说因为它很难化解,所以叫做"白色污染".故选B.
72.E   细节推理题.根据前文The idea of the invention comes from his housework.本发明的想法来自于他的家务.可知结合选项,应是说丹尼尔经常帮助妈妈做家务.故选E.
73.A   细节推理题.根据前文when he opens the closet,the plastic bags fly out.This makes him very angry.当他打开壁橱,塑料袋飞出去.这使他很生气.可知结合选项,应是说由于塑料袋到处飞,因此丹尼尔考虑如何解决塑料袋问题.故选A.
74.C   细节推理题.根据下文The experiment also showed that the plastic bags could be broken down in three months.实验还表明,塑料袋可以在三个月内被分解.可知结合选项,应是说丹尼尔做的另一个实验也表明塑料袋可以在3个月内化解.故选C.
75.D  细节推理题.根据上下文Now Byrd has got 30thousand dollars from his invention.(75)He has also got a lot of award from many universities.现在Byrd从他的发明获得了3万美元.(75)____,他也得到了许多大学的奖励.可知结合选项,应是说丹尼尔用发明得来的钱上了大学,同时在大学里也得到了许多奖金.故选D.

点评 做题时首先对原文材料迅速浏览,掌握全文的主旨大意.其次,细读题材,各个击破.掌握全文的大意之后,细细阅读材料后的问题,弄清每题要求后,带着问题,再回到原文中去寻找、捕获有关信息.

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