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S0G13 橢圓上一點到兩焦點距離和
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学用数学
GeoGebra
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四邉形 (四年級) 教師版
柱體建築師
兩組對邊相等的四邊形
画直线等分三角形的面积
球體建築師
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對稱求最小
Rectangle _03
線性規劃例7
Copy of Factorization of Quadratic Polynomials (Table Method) 因式分解一元二次多項式（表格法）
名師補習中介 Top Tutor
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Piecewise Functions
Parametric Curves
Ratios
Area
Unit Circle