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圆的有关概念
Author:
孟宝兴
GeoGebra
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三位數除以一位數（二）
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
兩位數加法
畫出對稱圖形
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六下_圓周(教師版)
ppppp
P53_3b
五角星
腳踏車風火輪
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Geometric Transformations
Exponent
Line Segment
Terms
Cube