单项选择题
Which item is NOT included in the fireman’s outfit on a cargo vessel?（）
A.Fire ax B.Flashlight C.rigid helmet D.Fresh air breathing apparatus
单项选择题 Which is a disadvantage of Halon as a fire extinguishing medium?（）
单项选择题 Which firefighting method is an example of an indirect attack on a fire?（）.
单项选择题 Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
