Besides heat, fuel, and oxygen, which of t
题型:单项选择题
问题:
Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?()
A.Chain reaction
B.Thermal action
C.Chemical occlusion
D.Pyrotechnical reaction
Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?()
A.Chain reaction
B.Thermal action
C.Chemical occlusion
D.Pyrotechnical reaction