在SQL语言的SELECT语句中,实现投影操作的是哪个子句A.SELECT B.FR

题型:单项选择题

问题:

在SQL语言的SELECT语句中,实现投影操作的是哪个子句

A.SELECT

B.FROM

C.WHERE

D.GROUP BY

考点:计算机等级考试数据库技术计算机三级(数据库技术)44
题型:单项选择题

All of the people have ambitions. An ambition is something we want to do, want to have, or want to be. A student’s ambition, for example, might be to pass his or her exams. An athlete’s ambition could be to win an important competition. A businessman’s ambition is usually to make a lot of money.

Not all ambitions are about success at work, however. Some people just want to be good people, have a happy family or help others.

Ben’s ambition is to be a sports writer. He writes the sports reports for his class newspaper. He likes most sports, but swimming and football are his favorites.

Trudy’s ambition is to be a concert pianist. She is very serious about it and practices every day with her best friend Lily. It is very important to her.

Harry’s ambition changes every day! One day he wants to be an astronaut. The next day he wants to be a pop singer. Then he wants to drive a racing car. His mother would be happy if his ambition was to get up in time for school every day!

What is your ambition?

小题1:The Chinese meaning of the underlined word “ambition” is “_______”.

A.信心

B.希望

C.理想

D.幻想小题2:What does a businessman want?

A.To pass the exams.

B.To win a competition.

C.To make a lot of money.

D.To get a good job.小题3:What does Ben want to be?

A.A newspaper reporter.

B.A famous swimmer.

C.A great football player.

D.A sports writer.小题4:Why does Trudy practice the piano every day?

A.Because she wants to be a concert pianist.

B.Because she wants to help Lily.

C.Because she wants to be a pop singer.

D.Because her mom tells her to.

题型:单项选择题

自花传粉在植物学上是指()的传粉,在果树栽培上指()的传粉,在农业上指()的传粉。

A.同一朵花内

B.同株异花内

C.同品种间

D.A和B

E.A、B和C

题型:单项选择题

词汇:根据首字母或汉语提示完成下列各句。

1. — W_____ to our school!

    — Thank you !

2. — See you l _____ ! 

    — See you!

3. — Excuse me, what's this in E _____ ? 

    — It's a ruler.

4. Hello, my name is Jim. I have a big head and a w _____ mouth.

5. — What's blue and yellow? 

    —  It's g _____ .

6. Jane and Sally are b _____ from the USA.

7. My mother is thirty-six y old.

8. The dress isn't yours. I think it's _____ (她的) dress.

9. The new pen is Tom's. The old one is _____ (我的).

10. A cat has four _____ (脚).

11. Those _____ (男孩子们) are in the same class.

12.Yao Ming is _____ and  _____(又高又壮).

13. My _____ (最喜欢的) color is white.

14. Sorry. I don't _____ (认识) her.

题型:单项选择题

列车在机车的牵引力下在平直铁轨上行驶,在50s内速度由10m/s增加到了15m/s,列车的质量是1000t,机车对列车的牵引力是1.5×105N。求列车运动中所受的阻力。

题型:单项选择题

下列关于中国国际经济贸易仲裁委员会的表述,哪一项是错误的( )。

A.中国国际经济贸易仲裁委员会是中国国际贸易促进委员会下属的一个民间性常设仲裁机构

B.中国国际经济贸易仲裁委员会对涉港、澳、台的有关案件可以进行仲裁

C.中国国际经济贸易仲裁委员会仲裁规则规定,合同中的仲裁条款或附属于合同的仲裁协议可被视为是独立于主合同的辅助合同,不因主合同的无效而无效

D.根据中国国际经济贸易仲裁委员会仲裁规则,争议金额超过50万元人民币的案件,如经一方当事人书面申请,可以适用简易程序

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