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三棱锥的体积推导的副本
Author:
孙广仁
GeoGebra
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折扣
第八周作业
第八周作业1
直線的斜率：水平變化 & 鉛垂變化
第八周作业3
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K9@cn
圓柱動態展開圖
Circumcentre
频率分布直方图与箱线图
移動愛心
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Optimization Problems
Tangent Line or Tangent
Integers
Reflection
Surface