• 2021-04-14 问题

    学生表(id,name,sex,age,depart_id,depart_name),存在函数依赖是id→name,sex,age,depart_id;dept_id→dept_name,其满足

    学生表(id,name,sex,age,depart_id,depart_name),存在函数依赖是id→name,sex,age,depart_id;dept_id→dept_name,其满足

  • 2021-04-14 问题

    学生表(id,name,sex,age,depart_id,depart_name),存在的函数依赖是id→{name,sex,age,depart_id}; dept_id→dept_name,其满足( )。

    学生表(id,name,sex,age,depart_id,depart_name),存在的函数依赖是id→{name,sex,age,depart_id}; dept_id→dept_name,其满足( )。

  • 2022-06-11 问题

    查询信息技术系,机电工程系和管理系的学生的信息,所使用的语法命令( ) A: select * from student where depart in(”信息技术系”,”机电工程系”,”管理系”) B: select * from student where depart in(’信息技术系’,’机电工程系’,’管理系’) C: select * from student where depart=”信息技术系”and depart=”机电工程系”and depart=”管理系” D: select * from student where depart=’ 信息技术系’ and depart=’ 机电工程系’ and depart=’ 管理系’

    查询信息技术系,机电工程系和管理系的学生的信息,所使用的语法命令( ) A: select * from student where depart in(”信息技术系”,”机电工程系”,”管理系”) B: select * from student where depart in(’信息技术系’,’机电工程系’,’管理系’) C: select * from student where depart=”信息技术系”and depart=”机电工程系”and depart=”管理系” D: select * from student where depart=’ 信息技术系’ and depart=’ 机电工程系’ and depart=’ 管理系’

  • 2022-06-11 问题

    查询不在信息技术系,机电工程系和管理系的学生的信息,所使用的语法命令为( ) A: select * from student where depart not in(’信息技术系’,’机电工程系’,’管理系’) B: select * from student where not depart=’ 信息技术系’ and depart=’ 机电工程系’ and depart=’ 管理系’ C: select * from student where not depart in(”信息技术系”,”机电工程系”,”管理系”) D: select * from student where not depart=”信息技术系”and depart=”机电工程系”and depart=”管理系”

    查询不在信息技术系,机电工程系和管理系的学生的信息,所使用的语法命令为( ) A: select * from student where depart not in(’信息技术系’,’机电工程系’,’管理系’) B: select * from student where not depart=’ 信息技术系’ and depart=’ 机电工程系’ and depart=’ 管理系’ C: select * from student where not depart in(”信息技术系”,”机电工程系”,”管理系”) D: select * from student where not depart=”信息技术系”and depart=”机电工程系”and depart=”管理系”

  • 2022-06-06 问题

    There are notices showing arrivals and (depart)______of trains near the booking-office.

    There are notices showing arrivals and (depart)______of trains near the booking-office.

  • 2021-04-14 问题

    The train will depart from Platform 2 at 3:45 on Tuesday morning.

    The train will depart from Platform 2 at 3:45 on Tuesday morning.

  • 2021-04-14 问题

    If we want to describe to leave,we can use abandon/depart/desert

    If we want to describe to leave,we can use abandon/depart/desert

  • 2022-06-06 问题

    When will the train ____ from the station? A: start B: commence C: leave D: depart

    When will the train ____ from the station? A: start B: commence C: leave D: depart

  • 2022-06-12 问题

    When will the train ____ from the station? A: begin B: depart C: commence D: start

    When will the train ____ from the station? A: begin B: depart C: commence D: start

  • 2022-06-12 问题

    When will the train ____ from the station A: egin B: depart C: commence D: start

    When will the train ____ from the station A: egin B: depart C: commence D: start

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