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Author:
杜耀宗
GeoGebra
New Resources
找出對稱軸
柱體建築師
四邉形 (四年級) 教師版
兩位數加法
三位數除以一位數（一）
Discover Resources
兩正弦波的合成波
Symmetric設計對稱圖案(兩條對稱軸)(斜)
小三_垂直
圓錐的曲面面積的副本
数学试卷难点解题思路
Discover Topics
Real Numbers
Mode
Statistics
Complex Numbers
Upper and Lower Sum or Riemann Sum