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
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相关考题
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单项选择题
Everything on the bridge should （）clean and tidy.
A.kept
B.keep
C.be kept
D.keeping -
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 -
单项选择题
The sailor keeping （）watch should clean the gangway, the rails, bulwark and the spaces around the gangway.
A.navigation
B.gangway
C.port
D.anchor
