Originally introduced by Netscape Communications, (21) are a general mechanism which HTTP Server side applications, such as CGI (22) , can use to both store and retrieve information on the HTTP (23) side of the connection. Basically, Cookies can be used to compensate for the (24) nature of HTTR The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (25) .

A．programs

B．applications

C．frameworks

D．constrains

可能与龋齿有关的病原菌是（）

A.艰难梭菌

B.大肠埃希菌

C.草绿色链球菌

D.白色念珠菌

E.变异链球菌