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更多“( )5. —How do the students send their homework to their teachers? —___________.A.By fax B. ”相关问题
  • 第1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2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.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'

    答案:D
    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( ))( )(SELECT身份证号,姓名FROM TeachersWHERE(请作答此空));

    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'

    答案:A
    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,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( );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6题:

    Text 2 A study published in the International Journal of Business Administration found that what students read in college directly effects the level of writing they achieve.In fact,researchers found that reading content and frequency may exert more significant impacts on students'writing ability than writing instruction and writing frequency.Students who read academic journals,literary fiction,or general nonfiction wrote with greater svntactic SODhistication(more comDlex sentences)than those who read genre fiction(mysteries,fantasy,or science fiction)or exclusively web-based aggregators.The highest scores went to those who read academic journals;the lowest scores went to those who relied sotely on web-based content.Recent research also revealed that"deep reading"-defined as reading that is slow,immersive,rich in sensory detail and emotional and moral complexity-is distinctive from light reading-little more than the decoding of words.Deep reading occurs when the language is rich in detail,allusion,and metaphor,and taps into the same brain regions that would activate if the reader were experiencing the event.Deep reading is great exercise for the brain and has been shown to increase empathy,as the reader dives deeper and adds reflection,analysis,and personal subtext to what is being read.It also offers writers a way to appreciate all the qualities that make novels fascinating and meaningful-and to tap into his abllity to write on a deeper level.Light reading is equated to what one might read in online blogs,or"headline news"or"entertainment news"websites,particularly those that breezily rely on lists or punchy headlines,and even occasionally use emojis to communicate.These types of light reading lack a genuine voice,a viewpoint,or the sort of analyses that might stimulate thought.It's light and breezy reading that you can skim through and will likely forget within minutes.Deep reading activates our brain's centers for speech,vision,and hearing,all of which work together to help us speak,read,and write.Reading and writing engages Broca's area,which enables us to perceive rhythm and syntax;Wernicke's area,which impacts our perception of words and meaning;and the angular gyrus,which is central to perception and use oflanguage.These areas are wired together by a band of fibres,and this interconnectivity likely helps writers mimic and synchronize language and rhythms they encounter while reading.Your reading brain senses a cadence that accompanies more complex writing,which your brain then seeks to emulate when writing.
    Students'writing abilities are mostly infiuenced by_____

    A.writing frequencies of students
    B.writing instructions from teachers
    C.students'reading content
    D.teachers'scores and evaluations

    答案:C
    解析:
    事实细节题。根据定位词定位到第一段。该段第二句提到“阅读的内容和频率才是影响学生写作能力最显著的因索”,故C项为正确选项。【干扰排除】根据第一段第二句,阅读频率会影响写作能力,并非A项“学生的写作频率”,故A项不正确;该句提到“比起写作教学和写作频率,阅读的内容和频率才是影响学生写作能力最显著的因素”,故B项“老师的写作教学”不正确;D项“老师的打分和评估”文中没有提到,故D项不正确。