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s1109480
GeoGebra
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兩位數加法
錐體建築師
柱體建築師
判斷球體
找出對稱軸
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正二十面體
為甚麼二次函數中,a是正數,開口向上?
buji
seq,tra
分數比較
Discover Topics
Cylinder
Coordinates
Vectors
Multiplication
Upper and Lower Sum or Riemann Sum