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定义法画椭圆
Author:
任吉
GeoGebra
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球体的体积推导（优化版）
找出對稱軸
四邉形 (四年級) 教師版
柱體建築師
異分母分數減法
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Copy of gjc091b18 圓的割線
線性規劃例10
關燈遊戲
小六_容量與體積問題
橢圓的副本
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Parallelogram
Cube
Terms
Geometric Mean
Sine