qt ubutun各个版本下载地址

http://download.qt.io/archive/qt/

 http://download.qt.io/new_archive/qt/5.7/5.7.1/

https://mirrors.ustc.edu.cn/qtproject/archive/

 http://download.qt.io/archive/online_installers/

http://mirrors.melbourne.co.uk/ubuntu-releases/