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椭圆的离心率
Author:
军云
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
兩位數除以一位數（一）
異分母分數減法
三位數除以一位數（二）
Discover Resources
初中八年级奥数：面积与面积法
香港的硬幣
glt-c02-00 長方體
盾牌(小動畫)
Copia de 分數除法5: x ÷ a/b (包含)
Discover Topics
Equations
Pyramid
Upper and Lower Sum or Riemann Sum
Means
Logarithmic Functions