the teacher has a word in his mind and asks students to guess by asking only yes/no questions until they make the correct guess. in this way, the teachers’ role is a/an ___________.A. organizerB. participantC. resource-providerD. assessor

题目
the teacher has a word in his mind and asks students to guess by asking only yes/no questions until they make the correct guess. in this way, the teachers’ role is a/an ___________.

A. organizer

B. participant

C. resource-provider

D. assessor


相似考题
参考答案和解析
正确答案是:B
更多“the teacher has a word in his mind and asks students to guess by asking only yes/no questions until they make the correct guess. in this way, the teachers’ role is a/an ___________. ”相关问题
  • 第1题:

    A:The classroom is not big enough for 50 students. B:Yes, I agree. It's ( ).

    A. too small

    B. no enough

    C. not enough bigger


    答案:A

  • 第2题:

    AnOrganization2010has2MailboxServersnamedServer1andServer2.EachonehasMailboxDatabaseand1PublicFolderDatabase.AlluserscreatePublicFoldersonServer1only.YouneedtoensurethatalluserscreatePublicFolderonServer2only.Whatshouldyoudo?()

    A.MoveallMailboxestoServer2

    B.RemoveallPublicFolderreplicasfromServer1

    C.ModifypropertiesofbothMailboxDatabases

    D.ModifypropertiesofbothPublicFolderDatabases


    参考答案:D

  • 第3题:

    假定学生Students和教师Teachers关系模式如下所示:Students(学号,姓名,性别,类别,身份证号)Teachers(教师号,姓名,性别,身份证号,工资)a.查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下:SELECT( )FROM Students,TeachersWHERE( );b.查询既是研究生,又是女性,且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下:(SELECT身份证号,姓名FROM StudentsWHERE( ))(请作答此空)(SELECT身份证号,姓名FROM TeachersWHERE( ));

    A.EXCEPT
    B.INTERSECT
    C.UNION
    D.UNIONALL

    答案:B
    解析:
    依题意,查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下:SELECT AVG(工资)AS平均工资,MAX(工资)-MIN(工资)AS差值FROM Students,TeachersWHERE Students.身份证号=Teachers.身份证号AND Students.类型='研究生';查询既是研究生,又是女性,且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下:(SELECT身份证号,姓名FROM StudentsWHERE性别='女'AND类别='研究生')INTERSECT(SELECT身份证号,姓名FROM TeachersWHERE工资>=3500);

  • 第4题:

    假定学生Students和教师Teachers关系模式如下所示: Students(学号,姓名,性别,类别,身份证号) Teachers(教师号,姓名,性别,身份证号,工资) a.查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下: SELECT ( ) FROM Students,Teachers WHERE( );

    b.查询既是研究生,又是女性,且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下: (SELECT 身份证号,姓名 FROM Students WHERE( )) ( ) (SELECT身份证号,姓名 FROM Teachers WHERE( ))

    A.AVG(工资) AS 平均工资,MAX(工资)-MIN(工资) AS差值 B.平均工资 AS AVG(工资),差值 AS MAX(工资)-MIN(工资) C.AVG(工资) ANY 平均工资,MAX(工资)-MIN(工资) ANY 差值 D.平均工资 ANY AVG(工资),差值 ANY MAX(工资)-MIN(工资) A.Students.身份证号 = Teachers.身份证号 B.Students.类别 =‘研究生’ C.Students.身份证号 = Teachers.身份证号 AND Students.类别 =‘研究生’ D.Students.身份证号 = Teachers.身份证号 OR Students.类别 =‘研究生’ A.工资>=3500 B.工资>=‘3500’ C.性别=女 AND 类别=研究生 D.性别=‘女’ AND 类别=‘研究生’ A.EXPERT B.INTERSECT C.UNION D.UNIONALL A.工资>=3500 B.工资>=‘3500 C.性别=女 AND 类别=研究生 D.性别=‘女’ AND 类别=‘研究生’


    正确答案:A,C,D,B,A

  • 第5题:

    假定学生Students和教师Teachers关系模式如下所示:Students(学号,姓名,性别,类别,身份证号)Teachers(教师号,姓名,性别,身份证号,工资)a.查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下:SELECT( )FROM Students,TeachersWHERE(请作答此空);b.查询既是研究生,又是女性,且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下:(SELECT身份证号,姓名FROM StudentsWHERE( ))( )(SELECT身份证号,姓名FROM TeachersWHERE( ));

    A.Students.身份证号=Teachers.身份证号
    B.Students.类别='研究生'
    C.Students.身份证号=Teachers.身份证号AND Students.类别='研究生'
    D.Students.身份证号=Teachers.身份证号OR Students.类别='研究生'

    答案:C
    解析:
    依题意,查询在读研究生教师的平均工资、最高与最低工资之间差值的SQL语句如下:SELECT AVG(工资)AS平均工资,MAX(工资)-MIN(工资)AS差值FROM Students,TeachersWHERE Students.身份证号=Teachers.身份证号AND Students.类型='研究生';查询既是研究生,又是女性,且工资大于等于3500元的教师的身份证号和姓名的SQL语句如下:(SELECT身份证号,姓名FROM StudentsWHERE性别='女'AND类别='研究生')INTERSECT(SELECT身份证号,姓名FROM TeachersWHERE工资>=3500);

  • 第6题:

    将students中的列变量重新命名为: (1)id_number, name, gender, score, has_graduate (2)选出Bob的性别gender,并存入变量bob_gender (3)选出列has_graduate,并存入向量status (4)创建数据框part_df,其中包含前三个学生的所有信息 (5)创建数据框rest_df,包含其余学生的所有信息


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