回複：關於數學，我們還是不要妄自尊大。

來源: fxl 於 2009-09-21 16:04:45 [] [舊帖] [給我悄悄話] 閱讀數 : (383 bytes)
本文內容已被 [ fxl ] 在 2009-09-23 04:14:19 編輯過。如有問題，請報告版主或論壇管理刪除.

Not sure if my daughters can do that. but I did figured them out, partially.
1. I did think the mother's answer was to say the big one is not from a twin;
2. turn on 1st for like 1min, turn it off; turn on 2nd and go upstairs, and touch the light. If it is on then it is the 2nd, if it is off and warm then it is the 1st, if it is off and cool and then it is the 3rd.

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• 謝。 -勃事後- ♂ 給 勃事後 發送悄悄話 勃事後 的博客首頁 (0 bytes) () 09/22/2009 postreply 15:19:39

• How can you know if the light doesn't work? -霍爾盟- ♂ 給 霍爾盟 發送悄悄話 (0 bytes) () 09/23/2009 postreply 02:11:55

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