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[主观题]

In this sixth grade classroom, you would find ______.A．only boys allowed to use the comput

In this sixth grade classroom, you would find ______.

A．only boys allowed to use the computers

B．only girls allowed to use the computers

C．no computers in the classroom

D．both boys and girls allowed to use the computers

答案

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发布时间：2022-12-02

更多“In this sixth grade classroom, you would find ______.A．only boys allowed to use the comput”相关的问题

第1题

I think _____lesson is the most difficult in this book.A.sixB.sixthC.sixteenD.the sixth

I think _____lesson is the most difficult in this book.

A.six

B.sixth

C.sixteen

D.the sixth

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第2题

The football game will be played ______ the sixth of June.

A.at

B.in

C.on

D.about

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第3题

Overseas commodity trade alone accounts for about ____ of the country's national income.

A.one sixth

B.one third

C.half

D.one fourth

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第4题

下面()是平凡依赖。

A.Sno Cname GradeCname Grade

B.Sno CnameCname Grade

C.Sno CnameSname Grade

D.Sno SnameSname

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第5题

全世界规定辐射剂量标准（)。

A.低于10千/Grade

B.低于12千/Grade

C.低于15千/Grade

D.低于20千/Grade

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第6题

It can be concluded that science education has reached a new ______ of development.

A.grade

B.class

C.standard

D.stage

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第7题

______the achievement, last week's ministerial meeting of the WTO here earned a low, though not failing grade

A.As to

B.Deposite

C.In spite of

D.With

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第8题

给定三个表学生表S，课程表C和学生选课表SC，它们的结构分别如下 S(S，SN，SEX，AGE，DEPT) C(C，CN)

给定三个表学生表S，课程表C和学生选课表SC，它们的结构分别如下：

S(S#，SN，SEX，AGE，DEPT)

C(C#，CN)

SC(S#，C#，GRADE)

其中S#为学号，SN为姓名，SEX为性别，AGE为年龄，DEPT为系别，C#为课程号，CN为课程名，GRADE为成绩。对表SC建立如下视图：CREATE VIEW S_GRADE(S#,C_NUM,AVG_GRADE)AS SELECT S#,COUNT(C#),AVG(GRADE)FROM SCGROUP BY S#;判断下面查询是否允许执行，如允许，写出转换到基本表SC上的操作。SELECT S#，C_NUMFROM S_GRADEWHERE AVG_GRADE80()。

A、不允许查询，因为视图中使用了分组和聚合函数。

B、允许，对应的操作为：

SELECT S#，COUNT(C#)

FROM SC

WHERE AVG(GRADE)80

C、允许，对应的操作为：

SELECT S#,COUNT(C#)

FROM SC

GROUP BY S#

HAVING AVG(GRADE)80

D、允许，对应的操作为：

SELECT S#, COUNT(C#)