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Author:
冉献伟
GeoGebra
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兩位數加法
拼砌四邊形
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
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Copy of 蔡01
立體ㄉ
图形动画3
正圆锥展开图
活工(三)Q1
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Numbers
Ellipse
Vectors
Quadratic Functions
Rhombus