問題詳情

14. Most cells range in size between 1 and 100 micrometers and are ______ only with theaid of a microscope.
(A) financial
(B) marvelous
(C) precise
(D) visible

參考答案

答案:D
難度:簡單0.769231
統計:A(3),B(2),C(1),D(20),E(0)

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