摩擦与冲击火花属于()。A:机械火源B:化学火源C:热火源D:电火源

作者: rantiku 人气: - 评论: 0
问题 摩擦与冲击火花属于()。
选项 A:机械火源 B:化学火源 C:热火源 D:电火源
答案 A
解析 机械火源是摩擦、撞击引起的火花;化学火源是化学反应产生热引起的火花;热火源是火炉、灯泡、明火等;电火源是电气火花。

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