设关系R和S的元组个数分别为10和30，关系T是R与S的笛卡尔积则T的元组个数是（） ["40","100","300","900"]
转炉煤气回收具有周期性、间断性的特点，故一般都要配置（）。 ["电厂锅炉","煤气柜","混合煤气用户"]
Your network consists of an Active Directory forest that contains two domains named contoso.com and Region1.contoso.com. All servers in the network run Windows Server 2003 Service Pack 2 (SP2). You attempt to create a universal security group and obtain the result shown in the exhibit. (Click the Exhibit button.) You need to ensure that you can create universal security groups in the contoso.com domain. What should you do in the contoso.com domain? （） [" Modify the Default Domain Policy."," Modify the Default Domain Controllers Policy."," Raise the domain functional level of the contoso.com domain."," Add your user account to the Enterprise Administrators group."]
You need to design a method for junior IT administrators to perform more IT support tasks. Your solution must meet business and security requirements. What should you do？（） ["Delegate appropriate Active Directory permissions to the junior IT administrators","Add the junior IT administrators’ user accounts to the Domain Admins user group","Create a custom Microsoft Management Console （MMC） that uses taskpad views to enable the appropriate tasks for the junior IT administrators","Make the junior IT administrators’ domain user accounts member of the local Administrators group on all client computers","Create new domain user accounts for each junior IT administrator. Make the new accounts members of the Domain Admins group and instruct junior IT administrators to use the new accounts only for appropriate administrative task"]
为了开发某种特殊的产品或者解决某一特殊问题而设置的团队，是信息时代的一种新的组织模式，这是指（） ["虚拟团队","研发团队","质量小组","联合团队"]
专利权
