单项选择题
A.aft perpendicular B.center of buoyancy C.keel D.center of flotation
Stability is determined principally by the location of ...
单项选择题Stability is determined principally by the location of the point of application of two forces: the downward-acting gravity force and the（）.
A.upward-acting weight force B.downward-acting weight force C.upward-acting buoyant force D.environmental force
Stability is determined by the relationship of the cent...
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
Repair of vital machinery and services on a ship should...
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
