单项选择题
A.conducts electricity B.should be directed at the base of the fire C.is most effective on burning gases which are flowing D.extinguishes by cooling oil fires below ignition temperature
Any ship damaging a pipe could（）an immediate danger of ...
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
Any firefighting equipment that is carried in addition ...
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
Any extinguishing agent used on a Class C fire must hav...
单项选择题Any extinguishing agent used on a Class C fire must have which important property?（）
A.Cooling ability B.Leaves no residue C.Penetrating power D.Nonconductivity
