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GeoGebra
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探究三角形的全等條件
兩位數除以一位數（二）
兩位數加法
圓周公式的應用
祖冲之的期望：内棋与外棋
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Is this a prism 11
直線交點
同心六邊形
二次函数图象与a,m,k关系的副本
河南2019中考第23题
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Ellipse
Linear Regression
Sine
Rational Numbers
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