阿摩線上測驗
6. What is the meaning of moving of an anchor over the sea bottom to control the movement of the vessel?
(A) Dragging of anchor
(B) Dredging of anchor
(C) Shifting of anchor
(D) Heaving of anchor
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統計： A(131), B(267), C(21), D(33), E(0) #3407475
統計： A(131), B(267), C(21), D(33), E(0) #3407475
