A.That
B.It
C.Which
D.What
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A.Loading
B.Load
C.Lade
D.Laden
A.Help，Help，Help
B.Mayday，Mayday，Mayday
C.Save，Save，Save
D.Rescue，Rescue，Rescue
A.on
B.at
C.in
D.above
A.Standing by on VHF frequency
B.Coming to VHF frequency
C.VHF frequency. is the best place for you to stay by
D.remaining in frequency. and do not change
A.I am going to change to VHF channel
B.I am certainly going to change to VHF channel
C.Changing to VHF channel
D.VHF channel. has been changed
最新試題
A call between any two ship stations on an intership working frequency shall have a maximum duration of（）.
All VHF marine band radios operate in the simplex mode，which means that（）.
If it（）fine tomorrow，we shall start unloading.
How should the letter O be pronounced when spoken on the radiotelephone?（）
There is a（）mine in position 50°N，30°W.
I am ready（）tow line.
The weather is often（）in a high-pressure area.
Some goods are missing（）terrible weather.
（）your present speed?
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? （）