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單項(xiàng)選擇題

The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.

A.SOS，ZZZ，XXX
B.SOS，UUU，SSS
C.SOS，XXX，TTT
D.SOS，TTT，UUU

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單項(xiàng)選擇題

The most likely time for oil pollution while bunkering is when（）.

A.final topping off is occurring
B.first starting to receive fuel
C.hoses are being blown down
D.hoses are disconnected and being capped

單項(xiàng)選擇題

Smoking in bed on a ship is prohibited（）.

A.at all times
B.during evening hours
C.unless another person is present
D.during drilling operations

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