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方向导数与梯度
Author:
敏敏
方向导数与梯度
GeoGebra
New Resources
球体的体积推导
球体的体积推导（优化版）
四邉形 (四年級) 教師版
異分母分數減法
找出對稱軸
Discover Resources
Light Game
畢氏定理學生(楊知樾)
Hyperbola_Horizontal
C60足球模型（金丝彩球）
拋物面的光學性質
Discover Topics
Hyperbola
Rhombus
Plane Figures or Shapes
Cone
Cosine