单项选择题
A.on B.by C.in D.for
The ship is not very stable，please（）when making a turn....
单项选择题The ship is not very stable，please（）when making a turn.
A.stop down B.speed down C.slow down D.down slow
The radiotelegraphy safety messages for condition indic...
单项选择题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
The most likely time for oil pollution while bunkering ...
单项选择题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
