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sharon扭曲的正方形
Author:
杨秀芬
GeoGebra
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算柱 (兩位數)
直角坐標平面上的旋轉變換
【案例】2013年安徽高考15题
三位數除以一位數（一）
找出對稱軸
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立方體拆解第一次
Book
小四平面圖形學習單
Testing: addition
任意角的三角函数
Discover Topics
Multiplication
Similar Triangles
Logarithm
Derivative
Straight Lines