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毕氏螺线
Author:
树常青
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
兩位數除以一位數(二)
【案例】2013年安徽高考15题
異分母分數減法
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我的社團圖形
Copy of 茵01
分數變身術
繡曲線02
圆与圆的位置关系
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Tree Diagrams
Isosceles Triangles
Complex Numbers
Rectangle
Constructions