Foam-type portable fire extinguishers are most useful in combating fires involving __________.(1.0)
A.solid materials such as wood or bales of fiber B.inflammable liquids C.electrical equipment D.metallic solids正确答案B
Foam-type portable fire extinguishers are most useful in combating fires involving __________.(1.0)
A.solid materials such as wood or bales of fiber B.inflammable liquids C.electrical equipment D.metallic solids正确答案B
