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GeoGebra
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三位數除以一位數（二）
找出對稱軸
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
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latex 的東西
Volume_Section
優良作品2(怡婷)
金惠吉：光的反射与折射
S6G7三视图
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Linear Equations
Quadratic Functions
Area
Boxplot
Logarithm