十一個同樣的鐵球，十個用繩子連著，一起扔下去，怎樣？

來源: 周老大於 2023-01-31 11:08:18 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.