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四次函數圖形觀察
Author:
haofuwei
GeoGebra
New Resources
畫出對稱圖形
錐體建築師
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數除以一位數（二）
Discover Resources
七巧板綜合
龍騰4_1-1講進5
數字組合
Torus
橢圓