问答题

On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic. ( Passage 1 )

【参考答案】

在过去的十年里，有很多次，大团被污染的空气笼罩着美国东部，给那些远离主要生产和交通堵塞地区的农民们敲响了健康警钟。
<上一题 目录 下一题>
热门 试题

问答题
Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth’ s temperature—a result that would be equally disastrous. ( Passage 1 )
单项选择题
As pointed out at the beginning of the passage, people used to think that air pollution ______.
A．caused widespread damage in the countryside
B．affected the entire eastern half of the United States
C．had damaging effect on health
D．existed merely in urban and industries areas
相关试题