建设周期指全部（）项目按当年投资规模建设需要经历的时间，也是全部在建项目建成平均需要的时间。
A.新建
B.在建
C.扩建
D.续建
参考答案：B
科学 * * 主义诞生的标志是( )。
A．英国工人制定《人民 * * 》
B． * * 主义通讯委员会建立
C． * * 主义者同盟建立
D．《 * * 党宣言》发表
The growth of switching has (135) a new generation of network management tools that help (136) cope with the challenges, (137) them to correlate device alarms in order to (138) pinpoint root causes, or to monitor service levels without depending on IP subnet schemes. These new tools have become essential to coping with the primary (139) effect of any treatment that significantly increases network flexibility: added complexity.
A．back
B．side
C．front
D．lateral
