单项选择题 The pivoting point of a fully loaded vessel with normal trim proceeding ahead at sea speed is（）.

单项选择题 The angle to which a floating ship，with a negative initial metacentric height，lies while at rest in still water is the angle of（）.

单项选择题 In the event of damage to the DEEP WATER SHIP which results in flooding to one of the lower-hull tanks，pump from（）.