单选题Moving of an anchor over the sea bottom to control the movement of the vessel defines（）.Adredging ( of anchor )Bdragging ( of anchor )Cweighing anchorDwalking out anchor
单选题
Moving of an anchor over the sea bottom to control the movement of the vessel defines（）.
A
dredging ( of anchor )
B
dragging ( of anchor )
C
weighing anchor
D
walking out anchor
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