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 HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based ___(70)___ .

A．programs　

B．applications

C．frameworks　

D．constrains

远期利率协议是指按照约定的汇率，交易双方在约定的未来日期买卖约定数量的某种外币的远期协议。（）