行动研究是一个螺旋式的发展过程。
You need to decide on the best router redundancy protocol to use in the Company network. Which two statements are true about HSRP， VRRP， and GLBP？（） [" GLBP and VRRP allow for MD5 authentication， whereas HSRP does not."," HSRP allows for multiple upstream active links being simultaneously used， whereas GLBP does not."," GLBP allows for router load balancing of traffic from a network segment without the different host IP configurations required to achieve the same results with HSRP."," Unlike HSRP and VRRP， GLBP allows automatic selection and simultaneous use of multiple available gateways."," GLBP allows for router load balancing of traffic from a network segment by utilizing the creation of multiple standby groups."]
成本计划编制的依据不包括下列哪项（）。 ["成本估算","WBS","项目进度计划","项目质量计划"]
对电梯质量以及安全运行涉及的质量问题负责的是（）。 ["电梯维修单位","电梯安装单位","电梯的制造单位","电梯设计单位"]
我国社会保障制度改革的必要性在于社会保障制度改革是（）的需要。 ["实现企业之间的平等竞争","迎接人口老龄化","劳动力的合理流动","筹集建设资金，加强经济调节作用","建立现代企业制度"]
无形资产的摊销，一般采用（），即按已定的摊销期分期等额摊销。
