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單項(xiàng)選擇題

General radio communications in the global system may（）ship’s safety.

A.be responsible for
B.have an impact on
C.command
D.give a guidance to

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單項(xiàng)選擇題

The distress alert should（）the ship in distress.

A.identity
B.identical
C.identify
D.identification

單項(xiàng)選擇題

Vessel in distress（）indicate their position by any method.

A.cannot
B.are no allowed
C.have the right
D.should get permission to

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