The three basic components of a fire are chain reaction, heat, fuel, and ____.A.carbon monoxideB.oxygenC.carbon dioxideD.any gaseous substance
题目
The three basic components of a fire are chain reaction, heat, fuel, and ____.
A.carbon monoxide
B.oxygen
C.carbon dioxide
D.any gaseous substance
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参考答案和解析
正确答案：B
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