对角色student_role授权，其权限是对数据库libinfo中图书信息表book_info具有查询权限，则该授权语句是（ ） A: grant select on student_role to libinfo.book_info; B: grant select on libinfo.book_info to student_role; C: grant update on student_role to libinfo.book_info; D: grant all on student_role to libinfo.book_info;

使角色 R1 拥有 Student 表的 SELECT、UPDATE、INSERT 权限的语句是 A: GRANT SELECT, UPDATE, INSERT ON TABLE Student to R1 B: REVOKE SELECT, UPDATE, INSERT ON TABLE Student to R1 C: AUDIT SELECT, UPDATE, INSERT ON TABLE Student to R1 D: ROLE SELECT, UPDATE, INSERT ON TABLE Student to R1

As visual channels, ____________is often underestimated. A: the role of presenter B: the role of audience C: the role of body language D: the role of slides

Windows Azure计算服务中应用程序包括 A: SQL存储实例、Worker Role实例，VM Role实例 B: Web Role实例、Worker Role实例，SQL存储实例 C: Web Role实例、Worker Role实例，VM Role实例 D: Web Role实例、SQL存储实例，VM Role实例

删除角色使用的命令是（） A: delete role B: drop role C: alter role D: evoke role

【单选题】使用命令添加用户student,设置密码为student,然后使用命令删除该用户。 A. useradd student passwd student userdel student B. useradd student passwd student sudo userdel student C. useradd student sudo passwd student sudo userdel student D. su root useradd student passwd student userdel student

OpenStack认证服务使用命令行方式创建角色的配置命令是( )。 A: openstack role add B: openstack role set C: openstack role create D: openstack role list

Internet plays an important role in exporting. Please list the role of Internet in exporting.

Jason can be described as facing which of these? A: Role overload B: Role conflict C: Role ambiguity D: Negative life events E: Daily<br/>hassles

play a role in