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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
球體建築師
畫出對稱圖形
柱體建築師
【案例】2013年安徽高考15题
画直线等分三角形的面积
Discover Resources
Constructing Quadrilaterals by Four Sides (2014)
給錐體一個名字 1
Quartiles and Box Plot (two data sets) 四分位數與框線圖（比較兩組數據）
追击问题
椭圆的一种画法.许兴华数学
Discover Topics
Real Numbers
Volume
Reflection
Parametric Curves
Quadratic Equations