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光的折射（光线自右下向左上）
Author:
樊双平
GeoGebra
New Resources
錐體建築師
【案例】2013年安徽高考15题
第八周作业
兩組對邊相等的四邊形
兩位數除以一位數（二）
Discover Resources
掷骰子
中國傳統剪紙_團花
Angle at centre twice angle at circumference
線性規劃
连杆
Discover Topics
Vectors 2D (Two-Dimensional)
Scalene Triangles
Exponential Functions
Addition
Similar Triangles