A customer has 4 POWER6 servers managed by a Hardware Management Console （HMC）. They plan to install a second HMC for redundancy. Which of the following statements correctlydescribes the dual HMC environment？ （） [" To provide the Service Agent function， both HMCs must have Service Agent enabled and a dedicated modem and phone line."," Authorized users must have the same username and password on both HMCs， so that every user of one HMC is automatically authorized on the other."," Both HMCs are automatically notified of any changes that occur in the managed systems， so results of changes made to the managed system by one HMC are visible on the"," Both HMCs must be running the same software revision. Software maintenance must be performed on both HMCs at the same time， but one HMC should be disconnected from"]
按照实证学说的观点，会计理论的功能不包括（）。 ["解释功能","指导功能","预测功能","辩解功能"]
简述密钥的分类和作用。
有关激光构造深度仪的描述中，正确的有（）。 ["测定结果可以直接用于平定路面的抗滑性能","适宜检测速度为3~5km\/h","测定结果与铺砂法测定结果有良好的相关关系","标准的计算区间长度为100m"]
申请加人世界贸易组织需经世贸组织成员方完全协商一致同意才能通过。
统计活动一般按照统计设计、统计调查、（）、统计分析和统计资料的开发利用这几个阶段依次进行。
