CAD教程http://www.sooweb.net/Soft_Show.asp?SoftID=5 http://www.136it.com/ReadNews.asp?NewsID=489 http://www.enet.com.cn/eschool/zhuanti/autocad/ http://www.cadedu.com/ http://itbook.godele.com/ http://www.fastgun.net/so/class/zy_183_1.htm