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平行2
Author:
Hui Sir
GeoGebra
New Resources
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
四邊形的特性
Discover Resources
三视图试卷讲评
圖解最簡根式
Copy of 簡易的迷宮
Triangle
K1+k2
Discover Topics
Trapezoid
Parallelogram
Sine
Arithmetic
Cuboid