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一道三视图的题目（三视图作法参考）
Author:
肖建伟
GeoGebra
New Resources
Nested spiral octagon
算柱 (兩位數)
球體建築師
兩組對邊相等和有直角的四邊形
sanjiaohanshu
Discover Resources
我的第一個GGB動畫
中心对称
凸透镜成像
vector stack pile
方向導數與梯度 (Gradient)的副本
Discover Topics
Rhombus
Quadratic Equations
Sine
Perimeter
Matrices