单选题A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.Aalternate expansion and contraction as water in a liquid state becomes a vaporBabsorption of smoke and gases as water is converted from a liquid to a vaporCrapid contraction as water is converted from a liquid to a vaporDrapid expansion as water absorbs heat and changes to steam
单选题
A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.
A
alternate expansion and contraction as water in a liquid state becomes a vapor
B
absorption of smoke and gases as water is converted from a liquid to a vapor
C
rapid contraction as water is converted from a liquid to a vapor
D
rapid expansion as water absorbs heat and changes to steam
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