下面的例子中属于内能转化成机械能的是 A.钻木取火b.陨石的坠落c.用弹弓把石子射出去d.点燃爆竹爆竹腾空而起 题目和参考答案——青夏 Template




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tomski下面的例子中属于内能转化成机械能的是 a.钻木取火b.陨石的坠落c.用弹弓把石子射出去d.点燃爆竹爆竹腾空而起 题目和参考答案——青夏 coloring