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分數加法
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iedc
GeoGebra
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讀磅
圓的切線方程
【案例】圆柱体内放置一个大球六个小球
【案例】2013年安徽高考15题
祖冲之的期望:内棋与外棋
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Locus教學
松菸巨蛋談判工作表
伸展收縮變換
畢氏數
圓的基本性質
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Arithmetic
Hyperbola
Linear Equations
Probability
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