问题 单项选择题

数据库设计有四个阶段,构造数据流图属于以下哪个阶段的任务

A.需求分析

B.概念设计

C.逻辑设计

D.物理设计

答案

参考答案:A

解析: 数据库规范设计方法中比较著名的有新奥尔良(New Orleans)方法。它将数据库设计过程分为以下几个步骤:需求分析、概念设计、逻辑设计和物理设计。其中,需求分析就是要准确了解与分析用户需求(包括数据需求与处理需求),确定新系统应满足的要求,即明确新系统应当“做什么”的问题。其基本任务是:对现实世界要处理的对象(组织、部门、企业等)进行详细调查,在了解现行系统的概况、确定新系统功能的过程中,收集支持系统目标的基础数据及其处理方法。需求分析是在用户调查的基础上,通过分析,逐步明确用户对系统的需求,包括数据需求和围绕这些数据的业务处理需求。需求分析主要是按照所提出的设计任务收集相关的数据及数据处理的流程,分析各业务的输入数据、输出数据、各类数据的使用频度及各部门之间交换的数据数量等,整理出“需求说明书”,作为以后各阶段工作的基础。需求分析的主要工作有:数据流程图的绘制、数据分析、功能分析、确定功能处理模块和数据之间的关系。

完形填空

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第二节: 完形填空(共20小题, 满分20分)

Once upon a time, there was a boy who would go into the forest and gather food and herbal medicines(草药) with some of his fellows every spring. However, one year, a tiger  36  in the forest and no one dared go into the forest again. One day, the boy’s father became  37 , and the family couldn’t afford the  38  that the father needed. The boy decided to try and find some herbal medicines as well as some food in the forest.

It was a perfect sunny day. At first, it was quiet and  39  happened. But later, when the boy bent down to reach one more mushroom, he was suddenly pushed to the ground. A large shadow 40   him. He rolled over and looked  41  in shock as the tiger said in a deep voice. “You are my  42  . Say good-bye to this world.”  43  his sick father, the boy knew he couldn’t die. He quickly calmed down and put a(n)  44  into his mouth, and chewed and swallowed.Then he said, “45  you can kill and eat me, but I  46  you to know that these mushrooms are  47  poisonous(有毒的). You can eat me,  48  you will die too. My family will  49 me and find you. They will  50 your stomach and eat your meat. Your fine  51 will carpet the floor of a rich man’s house and your tiger bones will get a good  52  in the medicine shops. My family will have enough for a year or more and I will be given a good funeral(葬礼) and long53  .

The tiger hesistated. He saw the frightful mushrooms in the basket and  54  his appetite(胃口). He slowly walked away. The boy saved his own life with his quick  55 .

36.   A.broke out       B. woke up       C. showed up        D. set out

37.A.hungry          B. ill            C. angry        D.mad

38.A.love               B. medicine       C.care          D.doctors

39.A.anything          B. everything      C. nothing      D.something

40.A.covered           B.followed           C. caught    D. pushed

41.A.down           B. out              C. around       D. up

42.A.energy          B. power           C. enemy    D. supper

43.A.Looking after   B. Thinking of     C.Bringing back     D. Believing in

44.A.stone         B.leaf              C. mushroom        D. apple

45.A.Of course       B.No way           C. In the beginning         D. In any case

46.A.choose             B. wish            C. persuade    D. order

47.A.expensive          B. delicious        C. deadly       D. magic

48.A.as             B. so             C. but          D. because

49.A.look for            B. call for         C. take care of   D. get rid of

50.A.feed              B. open            C. sell            D. kick

51.A.head            B.tail              C. paws          D.skin

52.A.price              B. seller            C. reward        D. doctor

53.A.understood       B.encouraged       C.needed        D.remembered

54.A.lost            B. increased          C. regained     D. forgot

55.A.skill           B. warning         C. thinking      D.word

单项选择题