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传播-折射反射-光强-王翚
Author:
王翚
GeoGebra
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【案例】2013年安徽高考15题
異分母分數減法
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
三位數除以一位數（二）
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圖騰 DEMO
f(x) and -f(x)
觀察軌跡
Angles formed by parallel lines and transversal
在数轴上表示根号数
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Continuity
Indefinite Integral
Median Line
Expected Value
Pie Chart or Circle Chart