�们可以利用矿泉水瓶做小实验来说明一些物理知识1在空矿泉水瓶侧壁不同高度的地方钻出上下两个小孔往里面倒满水可以观察到水从两个小孔流 Template




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tomski�们可以利用矿泉水瓶做小实验来说明一些物理知识1在空矿泉水瓶侧壁不同高度的地方钻出上下两个小孔往里面倒满水可以观察到水从两个小孔流 coloring