下列说法正确的是(    ) A.某一个生态系统中的水受到污染,对

下列说法正确的是(   

A.某一个生态系统中的水受到污染,对其他生态系统没有什么影响

B.生物圈就是一个巨大的生态系统

C.蛇类经常袭击人类,所以我们大量地捕捉蛇,这种做法是正确的

D.在美洲大量使用的DDT与我没有关系,因为我住在亚洲

答案

B

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