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happy new year
Author:
李春培
happy new year
GeoGebra
New Resources
錐體建築師
画直线等分三角形的面积
判斷球體
四邊形的特性
異分母分數減法
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根據百分率找數量（一）:例1
指數函數的平移(1)
Progressive Formula
碎形
鉛筆畫圓
Discover Topics
Trigonometry
Coordinates
Probability
Exponential Functions
Prism