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Author:
張道民
GeoGebra
New Resources
平行線的斜率
祖冲之的期望：内棋与外棋
折扣
圓的切線方程
盈利與虧蝕
Discover Resources
題五
柱體
version 1
函數圖形的變化（Ⅰ）
一筆畫圖形
Discover Topics
Arithmetic Mean
Cosine
Mode
Distributions
Function Graph