单项选择题
A hook that will release quickly is a（）.
A.longshore hook B.margin hook C.marginal hook D.pelican hook
单项选择题 （）should not be considered as components as fire installations.
单项选择题 （） is not the information necessary for the master to obtain guidance as to the stability of the ship.
单项选择题 Which document lists all the lifesaving equipment required for a vessel? （）
