题目：
In small-angle stability，when external forces exist，the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the（）.
A.center of gravity
B.center of flotation
C.metacenter
D.metacentric height
答案：
参考答案：C
In small-angle stability，when external forces exist，the buoyant force is assumed to act vertically upwards through the center of buoyancy and through the（）.
A.center of gravity
B.center of flotation
C.metacenter
D.metacentric height
参考答案：C
