Foam is a very effective smothering agent and ____________.(1.0)
A.provides cooling as a secondary effect B.works well on extinguishing electrical fires C.can be used to combat combustible metal fires D.all of the above正确答案A
Foam is a very effective smothering agent and ____________.(1.0)
A.provides cooling as a secondary effect B.works well on extinguishing electrical fires C.can be used to combat combustible metal fires D.all of the above正确答案A
