董卿主持的《中国诗词大会》第三季3月23日央视开播

百度 原标题：穿越时空梦回大秦多媒体史诗大秀《秦》揭面纱两千多年前，秦王嬴政一统天下，自称始皇帝，身后留下了气势恢宏的地下兵团秦兵马俑。

HTTP Strict Transport Security lets a website inform the browser that it should never load the site using HTTP and should automatically convert all attempts to access the site using HTTP to HTTPS requests instead. It consists in one HTTP header, Strict-Transport-Security, sent by the server with the resource.

In other words, it tells the browser that changing the protocol from HTTP to HTTPS in a URL works (and is more secure) and asks the browser to do it for every request.