单项选择题
The center of the underwater volume of a floating vessel is the（）.
A.center of buoyancy B.center of flotation C.uncorrected height of the center of gravity of the vessel D.center of gravity of the vessel corrected for free surface effects
单项选择题 The center of flotation of a vessel is（）.
单项选择题 The center of buoyancy is located at the（）.
单项选择题 The average of the forward and after drafts is the（）.
