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旋转和滚动摩擦
Author:
Peng Yu
GeoGebra
New Resources
撒针估算面积实验
斐波那契螺旋弧线（表格法-可动态调节）
活动三：应用性质
第三周作业效果演示
异形操场
Discover Resources
柏拉圖宇宙模型
总5第五题
Is this a prism 1
proof3(1-1)吳奕杰
三角函數的繪圖1
Discover Topics
Equilateral Triangles
Matrices
Quadrilaterals
Numbers
Hyperbola