成都网通测试结果，这个最快，4M带宽的ADSL单线程平均速度283KB/S

deb http://tw.archive.ubuntu.com/ubuntu feisty main restricted universe multiverse deb http://tw.archive.ubuntu.com/ubuntu feisty-security main restricted universe multiverse deb http://tw.archive.ubuntu.com/ubuntu feisty-updates main restricted universe multiverse deb http://tw.archive.ubuntu.com/ubuntu feisty-backports main restricted universe multiverse deb http://tw.archive.ubuntu.com/ubuntu feisty-proposed main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu feisty main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu feisty-security main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu feisty-updates main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu feisty-backports main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu feisty-proposed main restricted universe multiverse