单项选择题

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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The distress alert should（）the ship in distress.

A.identity
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What following is not among the functions of SOLAS ships?（）

A.receive shore-to-ship distress alerting
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D.transmit and receive locating signals