单项选择题
Any ship damaging a pipe could（）an immediate danger of fire.
A.meet B.face C.be in font of D.follow
单项选择题 Any firefighting equipment that is carried in addition to the minimum required must（）.
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（）.
