問題詳情

12. Maintaining the correct pH value in a marine aquarium is critical to the well-being of the fishes and the invertebrates it contains.
(A) crucial
(B)practical
(C) funny
(D) interesting

參考答案

答案：A
難度：簡單0.782609
統計：A(18),B(2),C(1),D(0),E(0)