centos7 的镜像下载地址：

http://mirrors.163.com/centos/7.7.1908/isos/x86_64/

阿里云的：
http://mirrors.aliyun.com/centos/7.7.1908/isos/x86_64/

华为云的：
http://mirrors.huaweicloud.com/centos/7.7.1908/isos/x86_64/
http://mirrors.cqu.edu.cn/CentOS/7.7.1908/isos/x86_64/
http://mirrors.tuna.tsinghua.edu.cn/centos/7.7.1908/isos/x86_64/
http://ftp.sjtu.edu.cn/centos/7.7.1908/isos/x86_64/
http://mirrors.njupt.edu.cn/centos/7.7.1908/isos/x86_64/

京东云:
http://mirror.jdcloud.com/centos/7.7.1908/isos/x86_64/
http://mirrors.neusoft.edu.cn/centos/7.7.1908/isos/x86_64/
http://mirrors.zju.edu.cn/centos/7.7.1908/isos/x86_64/
http://mirrors.nju.edu.cn/centos/7.7.1908/isos/x86_64/
http://ap.stykers.moe/centos/7.7.1908/isos/x86_64/
http://mirrors.cn99.com/centos/7.7.1908/isos/x86_64/
 

This directory (and version of CentOS) is deprecated.  For normal users,
you should use /7/ and not /7.5.1804/ in your path. Please see this FAQ
concerning the CentOS release scheme:

https://wiki.centos.org/FAQ/General

If you know what you are doing, and absolutely want to remain at the 7.5.1804
level, go to http://vault.centos.org/ for packages. 

Please keep in mind that 7.5.1804 no longer gets any updates, nor
any security fix's.