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Re:题目描述太。。。。。。。他必须休息r分钟In Reply To:题目描述太。。。。。。。他必须休息r分钟 Posted by:sideman at 2010-05-24 13:51:29 > 如果他在7分钟干完了活 休息2分钟 > 那么从第9分钟又能干活了。。。。。。 > 纱布 Followed by: Post your reply here: |
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