单选题

In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and form____.

A petroleum crystals

B carbon monoxide

C phosgene gas 在一个开放的火焰或热表面的存在下，氯化碳氟制冷剂分解形式

D water vapor

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正确答案：A （备注：此答案有误）

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