难的你行不?
给你一个竞赛的"希望杯"的!
遇到不明白的就问我吧.
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还有还有,刚找到的
http://public.bdfzgz.net/teacher/xmaths/ShowArticle.asp?ArticleID=365
http://www.shuxue8.cn/index.php?op=col&id=10
http://www.910cn.cn/teacher/down/183/723/2273/16030/17948/32598.shtml
http://blog.cersp.com/userlog10/104854/archives/2008/887349.shtml
http://www.zgjsw.com/
http://www.chinaejj.com/courseware-action-down-id-2100.html
http://xxshx.jyjy.net.cn/Article/ShowClass.asp?ClassID=31
小学奥数读本(江苏版)
www.1088.com.cn
希望杯