在数据库逻辑设计中,当将E-R图转换为关系模式时,下面的做法哪一个是不正确的A.一个

题型:单项选择题

问题:

在数据库逻辑设计中,当将E-R图转换为关系模式时,下面的做法哪一个是不正确的

A.一个实体类型转换为一个关系模式

B.一个联系类型转换为一个关系模式

C.由实体类型转换成的关系模式的主键是该实体类型的主键

D.由联系类型转换成的关系模式的属性是与该联系类型相关的诸实体类型的属性的全体

考点:计算机等级考试信息管理技术三级信息管理技术笔试
题型:单项选择题

阅读理解。

     Do you like children? Do you have free (空闲的) time in the afternoon?  We need a babysitter (保姆) 

 for our son. He's five years old. The working time is Monday to Friday, 3:00 pm to 6:00pm. ( $ 5 an

 hour) We need help with: Looking after our son; Reading to him; Playing with him.

     You must work at our house. We live in Changchun, near the Culture Square (文化广场). Please call 

 Mr. Green at 5638-2949.

1. From Monday to Friday, the babysitter can work _____ every day.

    A. one hour

    B. two hours

    C. three hour 

    D. four hours

2. Which is NOT the work that the babysitter needs to do?

    A. Cooking for the child.

    B.  Playing with the child.

    C.  Reading books to the child.

    D. Looking after the child.

3. The babysitter must work _____.

    A. at the babysitter's house    

    B. at Miss Green's school.

    C. at Mr. Green's house.      

    D. at the Culture Square

4. The child in the ad (广告) is _____.

    A. 15 months old  

    B. 15 years old

    C. 5 months old  

    D. 5 years old

5. If (如果) ______, you can get the job.

    A. you like children, but you have no time in the afternoon

    B. you like children, but you don't know how to play with them

    C. you're good with children and you're free in the afternoon

    D. you can play with children but you don't know how to read

题型:单项选择题

下列赋值语句中正确的是(  )

A.m+n=3

B.3=i

C.i=i2+1

D.i=j=3

题型:单项选择题

阿法甲基芬太尼、阿法罗定、苄替

题型:单项选择题

叶轮给煤机型号(),最大出力为()。

题型:单项选择题

某建设工程项目规模很大,将对国民经济产生较大影响,现在要对该项目进行可行性研究。
根据题意,回答下述问题:

对该项目在财务评价基础上进行国民经济评价时,应( )。

A.剔除在财务评价中已计算为效益或费用的转移支付

B.增加财务评价中未反映的间接效益

C.采用影子汇率和社会折现率

D.使用投入物与产出物的现行价格

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