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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
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【案例】2013年安徽高考15题
球體建築師
柱體建築師
画直线等分三角形的面积
兩位數除以一位數（一）
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quadrilaterals 5
體積的量度 3
ghseh 二次函數描點法左右平移-4
構作對稱圖形
中考数学16讲
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Optimization Problems
Linear Equations
Exponential Functions
Constructions
Power Functions