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proof 64 潘研
Author:
郭亮偉
GeoGebra
New Resources
球體建築師
判斷球體
球体的体积推导（优化版）
算柱 (兩位數)
拼砌四邊形
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Dilate 習作
國旗
乘法训练
用向量找北极星
質數
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Surface
Variance
Vectors
Power Functions
Curve Sketching