0071 初一 七年级上数学 直线、射线、线段（四）国家中小学智慧教育平台
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![[高清新版]初中7年级(初一)上学期数学同步课 08 直线、射线、线段的概念 [2020人教部编版]](https://i.ytimg.com/vi/ZWzDSOxZHsE/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLA8YMhnuTqidOKNqULUdg52HxoOxw)
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