单项选择题
A.mattress fires
B.oil fires
C.wood fires
D.All of the above
单项选择题 Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.
单项选择题 Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
单项选择题 Overhauling a fire in the living quarters on a vessel must include（）.