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
(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)
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