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为什么两本书叠在一起会拉不开
更新时间: 2020-10-09 00:00:00  

摩擦力导致两本书难以被拉开,书的纸面不是平滑的,而是粗糙的,书页之间存在着细小的摩擦力,若将两本书的每一页叠在一起,虽然只是轻轻地将两本书夹在一起,但书页之间细小的摩擦力积少成多,变成巨大的摩擦力,阻碍书本的分开,因此人们很难把两本书拉开。

关键词: 为什么 本书 一起

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