單項(xiàng)選擇題Continuous sounding of a fog whistle by a vessel is a signal（）.

A.that the vessel is anchored
B.to request the draw span of a bridge to be opened
C.of distress
D.that the vessel is broken down and drifting


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2.單項(xiàng)選擇題According（）the report，the ship hit the wharf when berthing.

A.of
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