多项选择题 You recently upgraded all Windows NT Workstation 4.0 computers to Windows 2000 Professional. You want to give a new employee named Maria the ability to back up files, share resources, and install programs on a client computer that she shares with other users. You do not want Maria to be able to read other users’ files.   What should you do to accomplish these goals?（）

单项选择题 Maria has been set up as an assistant to the administrator. Users of your network are complaining that Maria has been opening their files and editing them. She needs to perform backups and installations of programs, and setting up of printers.   How do you fix the problem with the minimum amount of effort, yet allowing her to accomplish the assigned tasks? （）

单项选择题 YouupgradeallclientcomputersinyournetworktoWindows2000Professional.Thenyouapplythebasicwk.infsecuritytemplatetothecomputers.Now，noneoftheuserscanrunthecompany’sdatabaseapplication.Whatshouldyoudo？（）