GET / HTTP/1.0\nHost: ccl.pku.edu.cn\nUser-Agent: Tse/1.0\nConnection: Keep-Alive\n\nGET / HTTP/1.0\r\nUser-Agent: Wget/1.8.1\r\nHost: ccl.pku.edu.cn\r\nAccept: */*\r\nConnection: Keep-Alive\r\n\r\nGET /links/url.asp?id=53 HTTP/1.0\r\nHost: ccl.pku.edu.cn\r\nUser-Agent:Tse/1.0\r\nConnection: Keep-Alive\r\n\r\nGET /doubtfire HTTP/1.0\r\nHost: ccl.pku.edu.cn\r\nUser-Agent: Tse/1.0\r\nGET http://ccl.pku.edu.cn/resource.asp?item=1&expand=218&sort=hits HTTP/1.0Host: ccl.pku.edu.cnUser-Agent: Tse/1.0Connection: Keep-AliveGET / HTTP/1.0User-Agent: Wget/1.8.1Host: ccl.pku.edu.cnAccept: */*Connection: Keep-Alive pid=3074042800 sock = -1ParseUrlEx error in Fetch(): ccl.pku.edu.cn/doubtfire/science_human/2.htm!-:http://ccl.pku.edu.cn/doubtfire/link2file.asp?FileLink=/doubtfire/Science_Human/2.htmcollection has: 699 unvisited urls1. pid=3074042800 sock = -12. pid=3074042800 sock = -1ParseUrlEx error in Fetch(): ccl.pku.edu.cn/doubtfire/science_human/5.htm!-:http://ccl.pku.edu.cn/doubtfire/link2file.asp?FileLink=/doubtfire/Science_Human/5.htmcollection has: 698 unvisited urls1. pid=3074042800 sock = -1!header code = 500!-: http://ccl.pku.edu.cn/%5Cbbs%5Cdefault.asp