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Author:
chen mingchuan
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數加法
三位數除以一位數（一）
兩組對邊相等的四邊形
算柱 (兩位數)
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Addition / Subtraction of 3 Directed Numbers
線的面化
動態軌跡與動態色彩
点动成线
正方形折纸减去两角
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Histogram
Rational Numbers
Derivative
Mathematics
Angles