問題詳情

72. What was NOT a problem caused by DDT?
(A) It killed a lot of fish.
(B) Insects developed resistance to it.
(C) It poisoned rivers.
(D) It caused insects to increase.

參考答案

答案:D
難度:非常困難0
統計:A(0),B(0),C(0),D(0),E(0)

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