单项选择题

Stability is determined by the relationship of the center of gravity and the（）.

A.water depth
B.keel
C.center of flotation
D.center of buoyancy

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单项选择题

Repair of vital machinery and services on a ship should be accomplished（）.

A.after control of fire，flooding，and structural repairs
B.immediately
C.after control of fire，but before control of flooding
D.after stability is restored

单项选择题

Initial stability refers to stability（）.

A.at small angles of inclination
B.when loaded with minimum deck load
C.when at transit draft
D.when GZ is zero

单项选择题

Initial stability of a vessel may be improved by（）.

A.removing loose water
B.adding weight low in the vessel
C.closing crossover valves between partly filled double bottom tanks
D.All of the above