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vector sum
Author:
faanyat
GeoGebra
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【案例】2018年全国1卷理科12题
三位數除以一位數（一）
畫出對稱圖形
兩位數除以一位數（一）
異分母分數減法
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General Form of Quadratic Functions 二次函數的圖像：一般式
http://www.qsir.org/?p=8853
圓內接四邊形任務一: 提示二
分數1
滑桿動畫示範-1
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Ellipse
Rational Numbers
Variance
Square
Differential Equation