A.calls
B.called
C.calling
D.call
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A.telephone
B.telegraph
C.telex
D.VHF
A.calls at
B.has called at
C.call at
D.will call at
A.Calling frequency
B.Distress frequency
C.Urgency frequency
D.Working frequency
A.to be
B.is
C.will be
D.has been
A.at
B.by
C.in
D.on
最新試題
The weather is often（）in a high-pressure area.
A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
One hour before arrival at Elbe 1 light vessel，masters are advised to contact the pilot boat by（）.
Pilot Station，this is Chinese ship Jinsha（）.Over.
There is a VHF set（）the front of the wheelhouse.
There is a drifting mine（）in position 21 degrees 31 minutes North 124 degrees 20 minutes East.
How（）the cargo at loading port?
How should the letter O be pronounced when spoken on the radiotelephone?（）
If it（）fine tomorrow，we shall start unloading.