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面动成体
Author:
周胜华
GeoGebra
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兩位數加法
四邉形 (四年級) 教師版
拼砌四邊形
【案例】2018年全国1卷理科12题
四邊形的特性
Discover Resources
Locus 軌跡(2T)
testing
國旗
四角柱算體積(可以切開)
向量分解：解聯立
Discover Topics
Ratios
Vectors 3D (Three-Dimensional)
Derivative
Set Theory
Real Numbers