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GeoGebra
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三位數除以一位數(二)
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
錐體建築師
兩組對邊相等的四邊形
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四心的變化II
rabbit
拋物線5--包絡線法
七彩勾股树
數字鐘 的複本
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Logic
Expected Value
Fractal Geometry
Hypothesis Testing
Frequency Distribution