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．Client

B．Editor

C．Creator

D．Server

支气管哮喘的临床特征是（）

A.吸气性呼吸困难.

B.反复发作，呼气性呼吸困难.

C.反复发作，混合型呼吸困难

D.夜间阵发性呼吸困难.

E.肺部有较多的喘鸣伴肺底湿性啰音