单项选择题
When joining a vessel，do not forget personal documents and your spectacles，and（）if necessary.
A.drug B.remedy C.medicine D.healer
单项选择题 When evacuating a seaman by helicopter lift，which statement is TRUE?（）
单项选择题 When evacuating a seaman by helicopter lift，which course should the ship take?（）
单项选择题 When evacuating a seaman by helicopter lift，the vessel should be（）.
