Examine these statements: CREATE ROLE registrar GRANT UPDATE ON dtudent_grades TO registrar; GRANT registrar to user1, user2, user3; What does this set of SQL statements do? （） [" The set of statements contains an error and does not work."," It creates a role called REGISTRAR, adds the MODIFY privilege on the STUDENT_GRADES object to the role, and gives the REGISTRAR role to three users."," It creates a role called REGISTRAR, adds the UPDATE privilege on the STUDENT_GRADES object to the role, and gives the REGISTRAR role to three users."," It creates a role called REGISTRAR, adds the UPDATE privilege on the STUDENT_GRADES object to the role, and creates three users with the role."," It creates a role called REGISTRAR, adds the UPDATE privilege on three users, and gives the REGISTRAR role to the STUDENT_GRADES object."," It creates a role called STUDENT_GRADES, adds the UPDATE privilege on three users, and gives the UPDATE role to the registrar."]
我国学科课程的雏形是（） ["七艺","语文、数学、外语","礼、乐、射、御、书、数","“五经”、“四书&rdquo"]
铁路建设工程监理的主要依据是（）。 ["国家有关法律、法规及铁道部有关规章、制度；国家和铁道部有关标准、规范、规程","国家和铁道部对本项目的批复文件","审核合格的施工图\\本工程项目的委托监理合同、承包合同和材料设备供应合同","以上各项"]
You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as the administrator of a SQL Server 2005 computer， and the computer is named SQL1. The company has backups of all system databases performed every Saturday night， and have backups of all user databases performed every Sunday night. And the company has all backups stored in an off-site facility. Because of the power outage， SQL1 accidentally turns off. And after bringing SQL1 back online， the users cannot start the SQL Server service. You can see the SQL Server error log from the exhibit below. SQL1 should be returned to working order in the shortest time. Which action should be performed first？（） ["All of the user databases should be restored from backup.","Setup.exe should be run from a command line and a rebuild of the master database should be specified.","The SQL Server 2005 installation CD should be inserted and the setup utility should be run to have the default instance reinstalled.","All of the system databases should be restored."]
自由基对蛋白质的影响作用表现在（）。 ["直接作用","间接作用","加合作用","拮抗作用"]
产权
