20世纪上半叶的民国时期的社会行政具有如下特点（）A.社会行政体制开始转向现代建设

SQL SERVER 2000 与COMMERCE SERVER 2000 集成，支持完整的点击流和【 】数据分析。

More and more foreigners enjoy        to Peking Opera.[ ]

A. listen    

B. to listen  

C. listened    

D. listening

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．Client　　　

B．Editor　

C．Creator

D．Server

某温度下，浓度都是1 mol/L的两种气体X₂和Y₂，在密闭容器中反应生成气体Z，经过t min后，测得物质的浓度分别为c(X₂)＝0.4 mol/L，c(Y₂)＝0.8 mol/L，c(Z)＝0.4 mol/L，则该反应的反应式可以表示为 [ ]

A．X₂＋2Y₂===2XY₂  

B．2X₂＋Y₂===2X₂Y

C．3X₂＋Y₂===2X₃Y  

D．X₂＋3Y₂===2XY₃

新氢压缩机四级出口额定排气压力为（）MP。