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Introduction of pH

Author:Alex CHIK

http://www.geogebra.hk

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【案例】2013年安徽高考15题
畫出對稱圖形
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
球體建築師

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相切的三圓
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Polynomial Functions
Random Variables
Cosine
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Logarithm

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