清华北大资源

http://www.tup.tsinghua.edu.cn/sub_press/2/book/List_cs.asp?csbh=10

http://oa.ee.tsinghua.edu.cn/~zhangyujin/Download-Book/ 张玉金

http://oa.ee.tsinghua.edu.cn/~zhangyujin/C3-All/C3_CJ.htm

http://www.tup.tsinghua.edu.cn/sub_press/2/book/Showbook.asp?CPBH=047990-01

http://bj3s.pku.edu.cn/activity/subjects/lesson1.pdf