单项选择题
A.electrical fire in the engine room
B.oil fire in the engine room bilges
C.oil fire involving a grade "A" petroleum product
D.mattress fire in a stateroom
单项选择题 The most common type of containment device for spilled oil on the water is the use of （）.
单项选择题 A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）
单项选择题 Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.