地上有無數相距為一的//線。隨機在地上扔一棍長為A棍，為求 壓線的幾率

來源: 於 2010-05-02 14:25:56 [舊帖] [給我悄悄話] 本文已被閱讀：次

My friend,sometimes,You are careless than I did.I'm right?