修改Host文件，把这个内容添加到最后面

#GitHub Start
52.78.231.108 github.com
13.229.189.0 codeload.github.com
151.101.76.133 desktop.githubusercontent.com
151.101.188.133 desktop.githubusercontent.com
199.232.56.133 raw.githubusercontent.com
74.86.118.24 raw.githubusercontent.com
140.82.113.3 gist.github.com
185.199.108.153 assets-cdn.github.com
199.232.68.133 raw.githubusercontent.com
199.232.68.133 gist.githubusercontent.com
199.232.68.133 cloud.githubusercontent.com
151.101.192.133 camo.githubusercontent.com
199.232.68.133 avatars0.githubusercontent.com
199.232.68.133 avatars1.githubusercontent.com
199.232.68.133 avatars2.githubusercontent.com
199.232.68.133 avatars3.githubusercontent.com
199.232.68.133 avatars4.githubusercontent.com
199.232.68.133 avatars5.githubusercontent.com
199.232.68.133 avatars6.githubusercontent.com
199.232.68.133 avatars7.githubusercontent.com
199.232.68.133 avatars8.githubusercontent.com
#203.208.41.78 dl.google.com
#120.253.255.33 dl.google.com
#Download 下载
120.253.255.33 dl.google.com
120.253.255.33 dl-ssl.google.com

 #Groups
120.253.255.33 groups.google.com

 #Google URL Shortener
120.253.255.33 goo.gl

 #Google App Engine
120.253.255.33 appengine.google.com

 #Android Developer
74.125.113.121 developer.android.com


#GitHub End

如果还是无法打开的话，就去站长平台用ping工具获取到可以访问该网站的ip地址
用本地cmd去ping一下，如果速度可以，再把这个ip替换到上面的内容里面
测试连接
1.http://dl.google.com/android/installer_r24.3.4-windows.exe
2.https://github.com/2085886325/-