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铅笔画圆
Author:
fenqinyao
GeoGebra
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兩位數加法
球體建築師
【案例】2013年安徽高考15题
兩組對邊相等的四邊形
兩位數除以一位數（二）
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雙曲線的題目
龍騰4_1-1習6-2
優良作品2
pentagon
餘弦函數 y=Cos(x)
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Constructions
Trigonometry
Planes
Solids or 3D Shapes
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