单项选择题
A.release the gripes
B.release tricing pendants
C.put the cap on the drain
D.lift the brake handle
单项选择题 To keep injured survivors warm in the water after abandoning a ship，they should（）.
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（）.
单项选择题 The tops of the thwarts，side benches，and the footings of a lifeboat are painted which color?（）