父亲节那天，小明给父亲启啤酒时，发现瓶口出现“白雾”，这是瓶内的气体冲出时，内能转化为_1能，使气体的内能减小，温度降低，水蒸气液化而产生的现象．这个现象说明_2可以改变物体的内能．_刷题宝

题干

父亲节那天，小明给父亲启啤酒时，发现瓶口出现“白雾”，这是瓶内的气体冲出时，内能转化为____能，使气体的内能减小，温度降低，水蒸气液化而产生的现象．这个现象说明____可以改变物体的内能．

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机械,做功

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____	____	____	____	____	____

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Don't take everything!" he said so ____ (serious).

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