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20200108中线倍长大法
Author:
陈敦莹
GeoGebra
New Resources
撒针估算面积实验
龙形曲线-分形龙
第八周作业2
第八周作业
折扣
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Prism and Cylinder
圓柱
二次函數04
黃金三角形
時鐘
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Constructions
Integers
Tangent Line or Tangent
Numbers
Means