单项选择题
（）(水密舱) are in the hull.
A. Gastight compartments B. Watertight compartments C. Water compartments D. Tight compartments
单项选择题 A ship’s coat is called （）(船壳).
单项选择题 It’s also the sailors’ job to （）(照料) cargo.
单项选择题 Much time is spent （）(保养) the ship at sea.
