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轨迹17
Author:
万超杰
GeoGebra
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四邉形 (四年級) 教師版
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數(二)
【案例】2013年安徽高考15题
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ghseh 二次函數描點法左右平移-3
圓與切線
sequence
拼出三角形的副本
除法Q3
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Numbers
Surface
General Quadrilateral
Division
Congruence