Reserve buoyancy is the（）.<br>A:unoccupied space below the waterline<br>B:volume of intact space above the waterline<br>C:excess of the buoyant force over the gravity force<br>D:difference in the buoyant force in salt and fresh waters

Reserve buoyancy is the（）.
A:unoccupied space below the waterline
B:volume of intact space above the waterline
C:excess of the buoyant force over the gravity force
D:difference in the buoyant force in salt and fresh waters

出自：海船船员证

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