問題詳情

21.Moving of an anchor over the sea bottom to control the movement of the vessel is .
(A)dragging of anchor
(B)dredging of anchor
(C)let go anchor
(D)heaving anchor

參考答案

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