給定的條件不足，無法判斷。說能判斷出的也是瞎蒙的。繼續索要已知條件，以便正確解題。：）

來源: WXCTEATIME 於 2012-09-12 08:52:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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