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
B.identical
C.identify
D.identification -
单项选择题
Vessel in distress（）indicate their position by any method.
A.cannot
B.are no allowed
C.have the right
D.should get permission to -
单项选择题
What following is not among the functions of SOLAS ships?（）
A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals
