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Air Pollution refers to the addition of harmful substances to the atmosphere resulting in damage to the environment, human healt
Air Pollution refers to the addition of harmful substances to the atmosphere resulting in damage to the environment, human healt
admin
2010-04-12
43
问题
Air Pollution refers to the addition of harmful substances to the atmosphere resulting in damage to the environment, human health, and【S1】______of life. One of many forms of pollution, air pollution occurs inside homes, schools, and offices; in cities; across continents; and even【S2】______. Air pollution makes people sick—it causes breathing problems and【S3】______cancer—and it harms plants, animals, and the ecosystems (生态系统) in which they live. Some air pollutants return to earth in the form of acid rain and snow, which destroy【S4】______and buildings, damage crops and forests, and make lakes and streams【S5】______for fish and other plant and animal life.
Pollution is changing Earth’s atmosphere so that it lets in more harmful radiation from the Sun. At the same time, our polluted atmosphere is becoming a better insulator (绝缘体), which can【S6】______heat from escaping back into space and lead to a rise in global average temperatures. Scientists【S7】______that the temperature increase, referred to as global warming, will affect world food supply, alter sea level, make weather more【S8】______, and increase the spread of tropical disease.
Although the effects of future【S9】______change are unknown, some report that exaggerated weather conditions may【S10】______affect agriculture, for example, it may lead to severe drought and sharply decreasing agricultural yields in parts of Africa.
A) globally B) promotes C) predict D) unsuitable
E) science F) dramatically G) protect H) prevent
I) quality J) climate K) statues L) significant
M) powerful N) moderately O) extreme
【S6】
选项
答案
H
解析
首先,由于前面有助动词can,所以这里需要一个动词;其次,这句话是一个非限制性定语从句修饰绝缘体一词;再者,从意思上看,绝缘体主要是对物质的传导起阻碍作用,因此,本题选择prevent。本句话的意思是“同时,被污染的大气会变成一个更好的绝缘体,阻挡热量散失回外部空间,从而导致全球平均气温上升。”
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0
大学英语四级
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