問題詳情
【題組】12. The author mentions all of the following as an example of ways to renew trace minerals in the soil EXCEPT
(A) plowing crop wastes into the soil
(B) organic farming
(C) using appropriate water
(D) growing the same crop year after year
參考答案
答案：D
難度：適中0.575
統計：A(8),B(8),C(16),D(46),E(0)