問題詳情

【題組】16. The phrase "This concern" in line 23 refers to the
(A) loss of vitamins in plants
(B) production of hardier species
(C) use of chemical fertilizers
(D) distribution of agricultural products

參考答案

答案：A
難度：適中0.653333
統計：A(49),B(5),C(15),D(6),E(0)