单项选择题
A.water B.sand C.saw dust D.derrick
After leaving the port, we used （）to clean the empty ho...
单项选择题After leaving the port, we used （）to clean the empty holds and decks.
A. fresh water B. sea water C. both A and B D. ballast water
Everything on the bridge should （）clean and tidy.A.kept...
单项选择题Everything on the bridge should （）clean and tidy.
A.kept B.keep C.be kept D.keeping
Decks, superstructure and hand rails may be washed with...
单项选择题Decks, superstructure and hand rails may be washed with （）water at sea.
A.sea B.ballast C.fresh D.cement
