单项选择题

The Mariner’s Handbook （）general information affecting navigation and is complementary to the Sailing Directions．

A.giving
B.give
C.gives
D.given

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单项选择题

A rigid replica of the International Code flag “A” may be shown by a vessel （）.

A.pulling a submarine cable
B.engaged in diving operations
C.engaged in underway replenishment
D.transferring explosives

单项选择题

A flooded lifeboat on board a vessel would adversely affect the vessel’s stability by（）.

A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG（center of gravity）off center