选择题 .  Originally introduced by Netscape Communications,     66    are a general mechanism which HTTP Server side applications, such as CGI     67    , can use to both store and retrieve information on the HTTP     68    side of the connection. Basically, Cookies can be used to compensate for the     69    nature of HTTR The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based     70    .66. 
【正确答案】 B
【答案解析】