单项选择题
The lifeboat releasing gear lever should be marked with the words（）.
A.DANGER，DO NOT TOUCH B.DANGER，BOAT MAY DROP C.DANGER，LEVER RELEASES BOAT D.DANGER，LEVER DROPS BOAT
单项选择题 The length of the steering oar in a lifeboat is（）.
单项选择题 The grab rail of a metal lifeboat is normally located（）.
单项选择题 The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.
