You need to create a column that allows you to createa unique constraint. Which two column definitions should you choose?（） nvarchar（100） NULL。 nvarchar（max） NOT NULL。 nvarchar（100） NOT NULL。 nvarchar（100） SPARSE NULL。
混凝土的抗渗等级，按标准试验方法进行试验所能承受的（）来确定。
从理论上讲，小型企业是指（）在企业中集中程度较低的企业。 劳动强度。 劳动力。 劳动手段。 劳动对象。
You are the administrator of a Microsoft Windows Server 2003 computer named SQL1. SQL1 runs SQL Server 2005 and is a member of a Microsoft Active Directory domain named Contoso.com. The domain is configured with all of the default settings. Several members of the information security team have requested access to SQL1. The information security team uses the Microsoft Windows XP Professional， Linux， and Macintosh operating systems to perform vulnerability assessments. The information security team members ask you to create two new logon accounts for their use. They would like the logon accounts to have the following user names and passwords： User name\password for first account： pentest\P@ssw0rdUser name\password for second account： hacktest\password You need to provide the information security team with the requested access to SQL1. Which Transact-SQL script should you use？（） CREATE LOGIN pentestWITH PASSWORD = 'P@ssw0rd' CREATE LOGIN hacktestWITH PASSWORD = 'password'。 CREATE LOGIN pentestWITH PASSWORD = 'P@ssw0rd' CREATE LOGIN hacktestWITH PASSWORD = 'password',CHECK_POLICY = OFF。 CREATE LOGIN pentestWITH PASSWORD = 'P@ssw0rd' CREATE LOGIN hacktestWITH PASSWORD = 'password'[HASHED]。 CREATE LOGIN [CONTOSO\pentest]FROM WINDOWS CREATE LOGIN [CONTOSO\hacktest]FROM WINDOWS&e。
《学记》中的“时教必有正业，退息必有居学”反映了古代（）的教育思想 教学为主。 重视实践。 因材施教。 课内与课外相结合。
Which storage subsystem can place files from the same directory in different storage poolsautomatically for improved performance?（）
