Which three tasks can be performed using a duplicate database?（） [" Testing the backup and recovery procedures"," Testing the upgrade of an Oracle database to a new release"," Testing the effect of an application changes on database performance"," Continuously updating archive log files from the target database to support failover"]
在ABC库存分类法中，A类库存品一般占总库存品种数的（） ["10%以下","15%-20%","75%-80%","80%以上"]
市场营销活动中的市场调查不包括下到哪个项目？（） ["顾客需求","经济发展水平","竞争情况"]
A host is to be part of a very small private network， which will never be connected to any other networks. Which of the following name resolution schemes would be the easiest to implement？（） ["DNS","NIS","DHCP","etc\/hosts file"]
施工过程中的成本控制，是指在项目成本的形成过程中，对生产经营所消耗的人力资源.物质资源和（），进行指导.监督和调节。 ["费用开支","时间成本","措施费","税费"]
总统制，起源于18世纪末期的（），是以总统既为国家元首，又为政府首脑的中央政府组织形式。
