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Author:
孟宝兴
GeoGebra
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GeoGebra笔记功能体验课件
兩位數加法
柱體建築師
兩組對邊相等和有直角的四邊形
四邊形的特性
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階梯圖形(一)
转网页后文字排版变乱
Light reflected in hyperbola
Copy of 正方體的反射對稱1
包含除法（1 ÷分數）的副本
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Parabola
Hyperbola
Combinatorics
Calculus
Conic Sections