知识管理系统为知识管理提供哪些基本服务（） A.自动识别企业的关键性知识，并建立知识库中知识之间的联系 。 B.能够分析每个具体用户独特的工作性质和需求，把员工所需要的知识及时传递给员工 。 C.提供知识创新和维护的技术工具 。 D.提供功能强大、简单便捷的搜索工具 。 E.能够自动地进行系统升级，促进知识创新。
根据下面所给的AAA数据库，按照下列每种功能写出相应的Transact-SQL语句或程序段
假设使用名称为AAA的数据库，它包括Students（学号char（8），姓名varchar（8），年龄int，专业varchar（20），入学日期DateTime）和Score（学号char（8），课程名varchar（10），成绩numeric（5，2））两张表。显示出Students表中所有学生记录的学号列的前四个字符。
结合实际，谈谈如何对中小学生进行心理健康教育？
下面哪个选择工具的选区可以被用来定义画笔的形状（） 矩形工具。 椭圆工具。 套索工具。 魔棒。
Your network consists of a single Active Directory domain named Contoso.com. You have a server named Server1 that runs Windows Server 2003 Service Pack 2 （SP2）. You have two domain user accounts named Admin1 and User1. Admin1 is a member of the Administrators group on Server1. User1 is a member of the Domain Users group only. You log on to Server1 as User1. You need to run several administrative tools. You must minimize the number of times you are prompted to enter a username and password when starting the tools. You must achieve this goal without logging off from Server1. What should you do？（） Configure the secondary logon service to start by using the Admin1 account.。 Configure the Start menu shortcut for each administrative tool to run as Admin1.。 Create a Start menu shortcut for cmd.exe to run as Admin1， and then start the administrative tools from the command prompt.。 Configure the Start menu shortcut for each administrative tool， and assign the Admin1 account ownership of the shortcuts.。
Your network contains a domain controller that runs Windows Server 2008 R2.
You need to change the location of the Active Directory log files.
Which tool should you use（）
