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九年级化学上册第1章开启化学之门第2节化学研究些什么课前思考水、冰、水蒸气之间的变化素材沪教版.ppt

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水,冰,水蒸气,水有三种存在形式，液态、固态和气态，你知道它们之间的转化属于什么变化吗？,结束,

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