問題詳情

21.For anchor operation, “up and down” means:
(A)the chain is not upright
(B)the chain is tight
(C)the chain is upright
(D)the chain is slack

參考答案

答案：C
難度：適中0.5
統計：A(1),B(2),C(3),D(0),E(0)

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