您的位置:杂志 > 《大学英语》 > 2006年 > 第12期
来源:《大学英语》2006年第12期  作者:王立河;何宇茵;
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三级阅读模拟练习两篇(英文)

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(一) America’s national symbol, the bald eagle, almost went extinct 20 years ago. But it has made a comeback. In fact, the U.S. Fish and Wildlife Service is considering the possibility of taking it off the endangered-species list. Once, more than 50,000 pairs of bald eagles nested across the country. But by 1960, that number had fallen below 400. The chief killer was the widely used DDT. Fish soaked up DDT, died, and were washed up on shores, where bald eagles feasted on them. DDT prevented eagle(本文共计3页)......[继续阅读本文]

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