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Introduction of pH
Author:
Alex CHIK
GeoGebra
http://www.geogebra.hk
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畫出對稱圖形
球體建築師
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
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二次函數的圖形
Circle
ycps4a1
线与平面的位置关系
S0A4 线性规划与不等式区域
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Numbers
Function Graph
Arithmetic Operations
Kite
Mathematics