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双镜面反射问题

Author:孟宝兴

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近似值：有效數字
算柱 (兩位數)
找出對稱軸
GeoGebra笔记功能体验课件
兩位數除以一位數（二）

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公切線的條數
达布和
因數的判別
BEES定理2
禪繞畫

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Complex Numbers
Random Experiments
Natural Numbers
Kite
Similarity Transformation or Similarity

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