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PMC 2014-15 Q4
Author:
Arthur Lee
圖中圓形的數目隨n的大小而改變。當n＝5，圖中應該有多小個圓？
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判斷球體
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兩位數加法
柱體建築師
算柱 (兩位數)
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正三角形的旋轉
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【高中物理】圆锥摆
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