单项选择题
It is a （）(压载水) tank.
A. bilge water
B. ballast water
C. fresh water
D. sea water
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单项选择题
From the waterline to the ship’s（）(底部) is called draft.
A.top
B.bridge
C.bottom
D.middle -
单项选择题
From the （）(水线) to the ship’s bottom is called draft.
A.waterline
B.centerline
C.frame
D.freeboard -
单项选择题
What’s “吃水” in English?（）
A.Draft.
B.Draught.
C.A+B
D.Freeboard.
