______、石蜡、松香等物质先熔融，后蒸发成蒸气，分解、氧化燃烧。
A、沥青
B、金属钾
C、电石
D、黄磷
【答案】A
题目：______、石蜡、松香等物质先熔融，后蒸发成蒸气，分解、氧化燃烧。
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