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单晨答重庆李琳
Author:
单晨
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等的四邊形
錐體建築師
判斷球體
兩位數除以一位數（二）
Discover Resources
甚麼是球體
repetitive square
歪斜線與三角形面積
Angle in alt.segment
時鐘
Discover Topics
Constructions
Variance
Logic
Rhombus
Hypergeometric Distribution