单项选择题
The vertical distance between G and M is used as a measure of（）.
A.stability at all angles of inclination B.initial stability C.stability at angles less than the limit of positive stability D.stability at angles less than the downflooding angle
单项选择题 The trim and stability booklet must be approved by the（）.
单项选择题 The time required to incline from port to starboard and back to port again is called（）.
单项选择题 The static stability curve for a given vessel peaks at 34°. For this ship，the danger angle for a permanent list would be about（）.
