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
If it（）fine tomorrow，we shall start unloading.
Vessels wishing to communicate with the Port Health Officer should do（）on VHF Channel 14.
How should the letter O be pronounced when spoken on the radiotelephone?（）
What is meant by veering the anchor chain? （）
（）both anchors.
How（）the cargo at loading port?
Pilot Station，this is Chinese ship Jinsha（）.Over.
I am ready（）tow line.
All VHF marine band radios operate in the simplex mode，which means that（）.
（）your present speed?