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为什么会打雷和闪电
更新时间: 2020-11-08 00:00:00  

会打雷和闪电是因为天上的云有的是正极,有的是负极。两种云碰到一起时,就会打雷和发出闪电,同时又放出很大的热量,使周围的空气受热,膨胀。瞬间被加热膨胀的空气会推挤周围的空气,引发出强烈的爆炸式震动。这就是雷声。

关键词: 为什么 打雷 闪电

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