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如何用6根等長的牙籤,排出4個「正三角形」?8964 copyright protection164PENANAEBt1KoCtlc 維尼
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P.S. 這是我小時候的一位代課老師出的題目,我答對了!可惜沒有獎品。8964 copyright protection164PENANAnjh9JC5ymy 維尼
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