单项选择题
Any firefighting equipment that is carried in addition to the minimum required must（）.
A.meet the applicable standards B.be marked as additional equipment C.be stowed in a separate area D.All of the above
单项选择题 Any extinguishing agent used on a Class C fire must have which important property?（）
单项选择题 An inert gas system on a tanker should be used to（）.
单项选择题 An inert gas system is designed to reduce the possibility of tank explosions by（）.
