相关考题
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单项选择题
The ship is now down（）head.
A.on
B.by
C.in
D.for -
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 -
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
