单项选择题
The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.
A.sheath-screw davit B.gravity davit C.radial davit D.bruckner davit
单项选择题 The tops of the thwarts，side benches，and the footings of a lifeboat are painted which color?（）
单项选择题 The steering oar in a lifeboat is usually referred to as the（）.
单项选择题 The steering oar in a lifeboat is（）.
