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Introduction of pH
Author:
Alex CHIK
GeoGebra
http://www.geogebra.hk
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找出對稱軸
畫出對稱圖形
拼砌四邊形
異分母分數減法
三位數除以一位數（二）
Discover Resources
判斷柱體 6
Quiz on Simplifying Ratios 比的化簡：測驗
ex 4
拼數咭
二分法
Discover Topics
Cylinder
Parametric Curves
Boxplot
Logarithm
Functions