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七彩之珠
Author:
李春培
七彩之珠
GeoGebra
New Resources
球体的体积推导
拼砌四邊形
異分母分數減法
球体的体积推导（优化版）
四邊形的特性
Discover Resources
甚麼是球體
三线八角
橢圓軌跡02
小船平移2
比例中的定值問題(三)
Discover Topics
Statistics
Complex Numbers
Exponential Functions
Coordinates
Trapezoid