耐火混凝土与烧成的同质耐火制品相比线膨胀系数（）。
A.较小
B.较大
C.大很多
D.差不多
参考答案：A
拍摄小景深的画面效果应选用（）.
A.大光圈
B.小光圈
C.广角镜头
D.长焦镜头
Originally introduced by Netscape Communications， (71) are a general mechanism which HrrP Server side applications，such as CGI (72) ，can use to both store and retrieve information on me HTTP (73) side ofthe connection．Basically，Cookies Can be used to compensate for the (74) nature of HTTP．The addition of asimple，persistent,client-side state significantly extends the capabilities ofWWW—based (75) ．
A．Client B．Editor C．Creator D．Server
