单项选择题

The downflooding angle for a ship is the minimum angle at which（）.

A.the load line becomes submerged
B.a non-watertight opening is at still water level
C.offset becomes excessive
D.reserve buoyancy is a maximum

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单项选择题
The difference between the height of the metacenter and the height of the center of gravity is known as the（）.

A.metacentric height
B.height of the righting arm
C.fore and aft perpendicular
D.height of the center of buoyancy
单项选择题
The difference between the forward and aft drafts is（）.

A.list
B.heel
C.trim
D.flotation
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