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正二十面體
Author:
侯杰材
正二十面體
GeoGebra
New Resources
兩位數除以一位數（一）
四邉形 (四年級) 教師版
球体的体积推导（优化版）
四邊形的特性
【案例】圆柱体内放置一个大球六个小球
Discover Resources
鉛筆畫圓
Tiling 2
I Love Pixar
乘法練習
解不等式
Discover Topics
Probability
Step Functions
Logic
Piecewise Functions
Set Theory