单项选择题
A.clean B.worn C.beautiful D.good
The sailors should show the relevant （）by day.A.ladders...
单项选择题The sailors should show the relevant （）by day.
A.ladders B.flags C.hands D.lines
You should （）the mooring lines according to the changes...
单项选择题You should （）the mooring lines according to the changes of draft.
A.adjusted B.adjusting C.adjustment D.adjust
Pay more attention to the rising and falling of （）.A.ti...
单项选择题Pay more attention to the rising and falling of （）.
A.tide B.water C.sea D.wave
