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拋物面的光學性質
Author:
宋政蒲
GeoGebra
New Resources
兩位數加法
画直线等分三角形的面积
異分母分數減法
球体的体积推导（优化版）
畫出對稱圖形
Discover Resources
onemove
磁磚著色
ex 8
教案一
以多維度解釋標準差
Discover Topics
Boxplot
Surface
Probability
Continuity
Natural Numbers