单项选择题
All lifeboats，rescue boats，and rigid-type liferafts shall be stripped，cleaned，and thoroughly overhauled at least once every（）.
A.6 months B.year C.18 months D.two years
单项选择题 After you have thrown the liferaft and stowage container into the water，you inflate the liferaft by（）.
单项选择题 After abandoning ship，you should deploy the sea anchor from a liferaft to（）.
单项选择题 After abandoning ship which action should be taken IMMEDIATELY upon entering a liferaft?（）
