单项选择题
Instructions to the crew in the use of all the ship’s lifesaving equipment shall be completed（）.
A.before sailing B.within one week of sailing C.in one month and repeated quarterly D.within any two month period
单项选择题 If you must jump from a ship，your posture should include（）.
单项选择题 If a mooring line should part while you are tying up at a dock，you should make a temporary eye by tying a（）.
单项选择题 How many adult life jackets are required on board a ship?（）
