�们可以利用矿泉水瓶做小实验来说明一些物理知识.1双手挤压空矿泉水瓶可以使瓶子变形如果施加的力增大瓶子变形程度就加大这表明力的作用 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双手挤压空矿泉水瓶可以使瓶子变形如果施加的力增大瓶子变形程度就加大这表明力的作用 coloring