单项选择题
Prior to entering a davit-launched life raft, you should make sure that（）.
A.the life raft is well ventilated of excess carbon dioxide B.all personnel have removed their life preservers to facilitate boarding C.the door flap has been cut away and stowed inside the raft D.All of the above
单项选择题 Removing which will extinguish a fire?（）.
单项选择题 A band or collar on the top end of a boom which the topping lift, midships guy, and outboard guys are secured, is called the（）.
单项选择题 A bench hook is used for（）.
