You create a Web site that is for members only. The Web site allows members to create lists of users that have access to information about member profiles. The name of the list is stored in the listName variable. The user name of the user to whom access is given is stored in the username variable. You need to enable members to manage their lists of users. Which code segment should you use? （） [" Roles.CreateRole(listName)User.IsInRole(listName)"," Roles.CreateRole(listName)Roles.AddUserToRole(userName, listName)"," Roles.RoleExists(listName)Roles.AddUserToRole(userName, listName)"," Roles.RoleExists(listName)User.IsInRole(listName)"]
孤立病灶
Your network contains an Active Directory domain. You have a server named Server1 that runs Windows Server 2008 R2. Server1 is an enterprise root certification authority （CA）. You have a client computer named Computer1 that runs Windows 7. You enable automatic certificate enrollment for all client computers that run Windows 7. You need to verify that the Windows 7 client computers can automatically enroll for certificates. Which command should you run on Computer1（） ["certreq.exe retrieve","certreq.exe submit","certutil.exe getkey","certutil.exe pulse"]
简述水轮发电机组是如何发电的？
光纤有什么特点？
计算机软件分为哪些软件？各自的作用是什么？
