In the absence of external forces, adding weight on one side of a floating vessel causes the vessel to（）.

A.heel until the angle of loll is reached

B.list until the center of buoyancy is aligned vertically with the center of gravity

C.trim to the side opposite TCG until all moments are equal

D.decrease draft at the center of flotation

课程标准作为衡量教育质量的基本依据，其核心部分是（）。

A．课程内容

B．课程目标

C．课程结构

D．课程理念