单项选择题
It is a （）(压载水) tank.
A. bilge water B. ballast water C. fresh water D. sea water
单项选择题 From the waterline to the ship’s（）(底部) is called draft.
单项选择题 From the （）(水线) to the ship’s bottom is called draft.
单项选择题 What’s “吃水” in English?（）
