A system has a mirrored data volume group that has a filesystem /data of 10 logical partitions. How many physical partitions will the filesystem have？（） ["1","2","10","20"]
在确定企业大中小的标准上，许多学者都坚持运用（）。 ["相对性原则","地域性原则","时间性原则","差异性原则"]
JZ-7型自动制动阀共有（）手柄作用位。 ["5个","6个","7个","8个"]
什么是噪音人们对噪音的耐受程度取决于哪些因素
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."]
何杰报告中强调教学法的运用，要了解学生的思维，（），倾听学生的声音，爱护学生的好奇心和求知欲是我们研究学生的基本出发点。
