w3school打开速度慢的解决办法
修改hosts
203.208.40.94 www.googletagmanager.com
203.208.50.89 pagead2.googlesyndication.com
203.208.43.77 googleads.g.doubleclick.net
203.208.43.72 fonts.googleapis.com
203.208.39.205 cm.g.doubleclick.net
203.208.40.94 www.googletagmanager.com
203.208.50.89 pagead2.googlesyndication.com
203.208.43.77 googleads.g.doubleclick.net
203.208.43.72 fonts.googleapis.com
203.208.39.205 cm.g.doubleclick.net
