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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
柱體建築師
【案例】2013年安徽高考15题
拼砌四邊形
兩位數加法
直角坐標平面上的旋轉變換
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認識正方形
特製的門 2
Form 6(中六級)
Sorting Geometric Figures
Copy of 包含除法（1 ÷分數）
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Addition
Real Numbers
Rhombus
Linear Equations
Fractal Geometry