单项选择题

When a vessel is in any doubt as to whether such a situation exists she shall（）that it does exist and act accordingly.

A.consume
B.assume
C.perfume
D.resume

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单项选择题
Vessels should maintain a sharp lookout，especially during December through March，when navigating the right whale’s only known calving grounds which lie off the coasts of（）.

A.Nova Scotia
B.Maine and Massachusetts
C.Georgia and NE Florida
D.California and Mexico
单项选择题
Vessel engaged in the launching or recovery of aircraft is called（）．

A.A vessel restricted in her ability to maneuver
B.A vessel not under command
C.A vessel constrained by her draught
D.A vessel not under way
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