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單項(xiàng)選擇題

International distress signal in VHF calling for help is（）.

A.Help，Help，Help
B.Mayday，Mayday，Mayday
C.Save，Save，Save
D.Rescue，Rescue，Rescue

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單項(xiàng)選擇題

There are salvage operations（）position 120.0N 12.5E.

A.on
B.at
C.in
D.above

單項(xiàng)選擇題

When it is accepted to remain on the frequency indicated，you should say（）.

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

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International distress signal in VHF calling for help is（）.

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There are salvage operations（）position 120.0N 12.5E.

When it is accepted to remain on the frequency indicated，you should say（）.

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When it is accepted to remain on the frequency indicated，you should say（）.