单项选择题
A.spread apart as far as possible
B.held as tightly against your chest as possible
C.in a kneeling position
D.extended straight down and crossed at the ankles
单项选择题 If the coxswain of your lifeboat gives the command HOLD WATER you should（）.
单项选择题 For a ship not on an international voyage，an approved substitute for an impulse projected rocket-type line throwing appliance is a（）.
单项选择题 Any vessel in need of carrying out deck washing must be（）by the department concerned beforehand.