单项选择题
I’m on fire and have dangerous cargo on board. The most urgent assistance (最紧急的援助)in this case would be（） .
A.lifeboat B.medicine C.firefighting D.lifesaving
单项选择题 （）(停顿) for a while when the boat leaves the surface.
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.
单项选择题 Second Officer, give one （）(长声).
