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范欣茹
GeoGebra
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算柱 (兩位數)
畫出對稱圖形
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
GeoGebra笔记功能体验课件
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五上_分數乘法(教師版)
如何用GGB化簡根式
習題0330-2017
k126各國基地
初中数学
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Translation
Ratios
Normal Distribution
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Calculus