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分段函数
Author:
龚洪萍
GeoGebra
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【案例】2018年全国1卷理科12题
判斷球體
畫出對稱圖形
四邉形 (四年級) 教師版
球體建築師
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圓面積計算
圓錐
認識時間
[洋葱] 二次函数中的将军饮马-上(0420)
平行四边形个数
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Intersection
Median Line
Inequalities
Rational Numbers
Statistics