A.persist
B.persists
C.to persist
D.persisted
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A.pay out
B.make fast
C.shorten
D.hold on
A.calls
B.called
C.calling
D.call
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
最新試題
If it（）fine tomorrow，we shall start unloading.
I am ready（）tow line.
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）
A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
Do you require any further assistance ? My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.
There is a VHF set（）the front of the wheelhouse.
You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear（）.
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
My ship（）that port next month.
The control of distress traffic is the responsibility of（）.