监理人员要按规定采取（）等形式，按作业程序即时跟班到位进行监督检查，对达不到质量要求的工程不得签字，并有权责令返工，有权向有关主管部门报告。 ["A.审批 ","B.调试 ","C.旁站 ","D.巡视 ","E.平行检验"]
You have the following online redo log configuration： Group Member 1 ’/disk1/oradata/redo01a.log’ 2 ’/disk2/oradata/redo02a.log’ 3 ’/disk3/oradata/redo03a.log’ You decide to multiplex the online redo log groups for recovery of redo log files in case of any disaster. Which two statements will you NOT issue to multiplex the online redo log files？（） [" ALTER DATABASE ADD LOGFILE MEMBER ’\/disk1\/oradata\/redo01b.log’ TO GROUP 1；"," ALTER DATABASE ADD LOGFILE MEMBER ’\/disk2\/oradata\/redo01b.log’ TO GROUP 1；"," ALTER DATABASE ADD LOGFILE MEMBER ’\/disk1\/oradata\/redo02b.log’ TO GROUP 2；"," ALTER DATABASE ADD LOGFILE MEMBER ’\/disk2\/oradata\/redo02b.log’ TO GROUP 2；"," ALTER DATABASE ADD LOGFILE MEMBER ’\/disk1\/oradata\/redo3b.log’ TO GROUP 3；"," ALTER DATABASE ADD LOGFILE MEMBER ’\/disk2\/oradata\/redo3b.log’ TO GROUP3；"]
南水北调工程政府管理机构由中央建设管理组织机构和（）构成。 ["南水北调工程建设领导机构","专家咨询委员会","项目法人管理机构","地方建设管理组织机构"]
An administrator is moving a volume group from one server to another. The disks will be physically moved between the two systems. Which two operations are required on the volume group prior to the physical disk switch？（） ["’varyoffvg’ and ’exportvg’","’varyofflv’ and ’importvg’","’varyofflv’ and ’migratepv’","’varyoffvg’ and ’migratevg&rsquo"]
某施工单位承担一土石坝施工任务，该单位对坝基开挖做了施工组织设计，坝基基坑深为5.2m，采用药壶爆破法施工，土方量为9000m3，平均运距为10km，合同工期为8天。该施工单位有甲、乙、丙液压挖掘机各4台、2台、2台，A、B、C自卸汽车各12台、30台、18台，挖掘机的机械利用率为0.9，自卸汽车的机械利用率为0.95，其主要参数见表1、表2。
若挖掘机和自卸汽车只能取一种，而数量没有限制，如何组合最经济？说明理由。并计算其单方挖运直接费。
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