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1977北京理7
Author:
常振虎
1977北京理7
GeoGebra
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兩位數除以一位數（二）
找出對稱軸
四邉形 (四年級) 教師版
第八周作业
判斷球體
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区域积分例子
圓族
選修數學
函数作图工具的副本
拋物線1-焦點法
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Cone
Variance
Median Value
Inequalities
Linear Regression