3，4部分也很正常呀，以下为证明

第三部分:
Sun Jul 18 20:20:31 2004 正在连接 3.csx.jp:80
Sun Jul 18 20:20:31 2004 正在连接 3.csx.jp [IP=221.251.37.14:80]
Sun Jul 18 20:20:31 2004 已连接.
Sun Jul 18 20:20:31 2004 GET /ronggang/book/Windows%20NT%20File%20System%20Internals：A%20Developer's%20Guide%20精美完整版（附随书源码）.part3.rar HTTP/1.1
Sun Jul 18 20:20:31 2004 Host: 3.csx.jp
Sun Jul 18 20:20:31 2004 Accept: */*
Sun Jul 18 20:20:31 2004 Referer: http://soft.winzheng.com/SoftView/SoftView_19184.htm
Sun Jul 18 20:20:31 2004 User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)
Sun Jul 18 20:20:31 2004 Pragma: no-cache
Sun Jul 18 20:20:31 2004 Cache-Control: no-cache
Sun Jul 18 20:20:31 2004 Connection: close
Sun Jul 18 20:20:36 2004 HTTP/1.1 200 OK
Sun Jul 18 20:20:36 2004 Date: Sun, 18 Jul 2004 12:19:33 GMT
Sun Jul 18 20:20:36 2004 Server: Apache/2.0.48 (Unix)
Sun Jul 18 20:20:36 2004 Last-Modified: Wed, 07 Jul 2004 07:33:35 GMT
Sun Jul 18 20:20:36 2004 ETag: "5bf1c8-2dc6c0-c9ad31c0"
Sun Jul 18 20:20:36 2004 Accept-Ranges: bytes
Sun Jul 18 20:20:36 2004 Content-Length: 3000000
Sun Jul 18 20:20:36 2004 Connection: close
Sun Jul 18 20:20:36 2004 Content-Type: text/plain
Sun Jul 18 20:20:36 2004 开始接受数据!
第四部分:
Sun Jul 18 20:21:41 2004 正在连接 3.csx.jp:80
Sun Jul 18 20:21:41 2004 正在连接 3.csx.jp [IP=221.251.37.14:80]
Sun Jul 18 20:21:41 2004 已连接.
Sun Jul 18 20:21:41 2004 GET /ronggang/book/Windows%20NT%20File%20System%20Internals：A%20Developer's%20Guide%20精美完整版（附随书源码）.part4.rar HTTP/1.1
Sun Jul 18 20:21:41 2004 Host: 3.csx.jp
Sun Jul 18 20:21:41 2004 Accept: */*
Sun Jul 18 20:21:41 2004 Referer: http://soft.winzheng.com/SoftView/SoftView_19184.htm
Sun Jul 18 20:21:41 2004 User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)
Sun Jul 18 20:21:41 2004 Pragma: no-cache
Sun Jul 18 20:21:41 2004 Cache-Control: no-cache
Sun Jul 18 20:21:41 2004 Connection: close
Sun Jul 18 20:21:44 2004 HTTP/1.1 200 OK
Sun Jul 18 20:21:44 2004 Date: Sun, 18 Jul 2004 12:20:41 GMT
Sun Jul 18 20:21:44 2004 Server: Apache/2.0.48 (Unix)
Sun Jul 18 20:21:44 2004 Last-Modified: Wed, 07 Jul 2004 07:34:57 GMT
Sun Jul 18 20:21:44 2004 ETag: "5bf1c9-2bcc2c-ce906a40"
Sun Jul 18 20:21:44 2004 Accept-Ranges: bytes
Sun Jul 18 20:21:44 2004 Content-Length: 2870316
Sun Jul 18 20:21:44 2004 Connection: close
Sun Jul 18 20:21:44 2004 Content-Type: text/plain
Sun Jul 18 20:21:44 2004 开始接受数据!
我每次下都很正常呀!