已知学生关系是;学生(学号,姓名,性别,专业号,班长),其中“学号”是主码,“班长”

题型:单项选择题

问题:

已知学生关系是;学生(学号,姓名,性别,专业号,班长),其中“学号”是主码,“班长”属性表示该学生所在班级的班长的学号,则学生关系是 ______。

A.是参照关系不是被参照关系

B.是被参照关系不是参照关系

C.既是参照关系又是被参照关系

D.没有参照关系

考点:计算机等级考试VISUALBASIC二级VISUALBASIC笔试21
题型:单项选择题

One day, my English teacher asked me to help her save back-up(备份) copies of her work in the computer. I then realized I was able to know the grades of all of her students. I   1  her how to copy files(文件) from one disk to another and she thanked me.
A few days later, she asked me to help her again, because she   2  how to do it. When I showed it to her, some students in my class   3  and began to talk among themselves   4  .Later that day, at lunch time, several of them came up to me.
“Hey, could you help us change our grades? We’ll   5  for it.”
I could not believe what I heard. I could get paid for something very   6 . “All right. I’ll do it.” The next day, my English teacher   7  me to help him out again. When he was not paying   8  , I changed their grades from Fs to As.
I soon became very   9  among my friends. They began to treat me like God who could do   10 . Word spread quickly and I became very rich.
Everything was going fine   11  I was called into the headmaster’s office. When I got there, both of my teacher and the headmaster were very angry. “ I don’t want to   12  what your teacher said, but I have to. She has too much evidence(证据),’’ the headmaster said. “Do you have anything to say for yourself?”
“No,” I said finally. I didn’t realize how   13  my behavior had been. I had disappointed my teacher and the headmaster. And there was no way   14 . I had to leave my school. That was a good   15  for me.
小题1:
A.saidB.urgedC.knewD.showed
小题2:
A.lostB.rememberedC.remindedD.forgot
小题3:
A.listenedB.noticedC.playedD.checked
小题4:
A.quietlyB.luckilyC.sincerelyD.angrily
小题5:
A.payB.praiseC.followD.explain
小题6:
A.familiarB.easyC.interestingD.pleasant
小题7:
A.challengedB.allowedC.taughtD.asked
小题8:
A.moneyB.workC.attention D.interest
小题9:
A.commonB.popularC.modestD.dishonest
小题10:
A.somethingB.anythingC.nothingD.some things
小题11:
A.untilB.sinceC.becauseD.after
小题12:
A.believeB.replyC.hateD.influence
小题13:
A.hardB.interestingC.seriousD.important
小题14:
A.upB.inC.backD.down
小题15:
A.skillB.lessonC.storyD.example
题型:单项选择题

某接地距离保护,不慎将φ+K3。的K值由原来的0.67误整定为0.5,则将造成保护区

A、伸长

B、缩短

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幼儿语法结构发展的特点是( )。

A.从简单句发展到复合句

B.从陈述句发展到多种形式的句子

C.从无修饰句发展到修饰句

D.从词数少的短句发展到词数多的长句

题型:单项选择题

突发公共卫生事件疾病预防控制机构的职责是()

A、实验室检测

B、开展科研与国际交流

C、制订技术标准和规范

D、开展技术培训

题型:单项选择题

建立违规积分制度,对经营管理过程中发现的各类违规行为按照()进行积分管理,并根据积分情况对相关责任人员进行责任追究和处理。

A.统一标准

B.上级要求

C.监管标准

D.检查要求

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