單項(xiàng)選擇題

When two power-driven vessels are meeting head-on and there is a risk of collision,each shall（）.

A.stop her engines
B.alter course to starboard
C.sound the danger signal
D.back down

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單項(xiàng)選擇題

The overall set in Malacca straight is to the NW, but from May to September there is a tendency for SE sets to prevail in some N and central parts.In this sentence,“set”refers to（）.

A.The direction of traffic flow
B.The direction of current
C.The direction of monsoon
D.The direction of wind

單項(xiàng)選擇題

（）indicates the weight of the vessel and is,therefore,according to a well known principle of physics,equal to the weight of the water it displaces.

A.Gross tonnage
B.Net tonnage
C.Displacement tonnage
D.Deadweight tonnage