錯了,假如他打定主意帶炸彈,那麽飛機上至少有一個炸彈的幾率是1,有第二個炸彈的幾率不變

來源: nightrose 於 2012-01-18 13:56:08 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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