問題詳情

【題組】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)