单项选择题
（）(所有船员) must know the locations as well as the operations of the life-saving and fire-fighting appliances.
A. All officers B. All engineers C. All the crew D. AB and C
单项选择题 Second Officer, give one （）(长声).
单项选择题 Where do you post your （）(火势控制图)?
单项选择题 Send a fire （）(火势探测员) to see the situation .
