2006年1月28日
摘要: As I announced last midnight, I went on my study on discrete mathematics today. I made up my mind to do as many exercises as I can, and so I did. Open my exercise book, you'll see the book is use... 阅读全文
posted @ 2006-01-28 01:01 rocman 阅读(1444) 评论(0) 推荐(0) 编辑