问题 单项选择题

在数据管理技术的发展过程中,可实现数据高度共享的阶段( )。

A.人工管理阶段

B.文件系统阶段

C.数据库系统阶段

D.系统管理阶段

答案

参考答案:C

解析:[分析] 数据管理是系统中的重要内容,从系统中独立出来的数据库管理系统就是专门管理系统数据的子系统。

填空题
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     A lot of people are their own enemies. They regard themselves as unlikely to succeed in college and

often feel that there have been no accomplishments (成就) in their lives. In my first year of college

especially, I saw people get themselves down too quickly. There were two students in my class who failed the first test and seemed to give up immediately. From that day on, they walked into the classroom carrying defeat on their shoulders the way other students carried textbooks under their arms. When they

disappeared for good(长久地), no one took much notice, for they had already disappeared in spirit after

that first test.

     I have really wanted to shake them by the shoulders and say: "You are not dead. Be proud and pleased that you have brought yourself here to college. Breathe. Hope. Act." Such people should not use

self-doubts as an excuse for not trying. They should pull themselves together and get to work. They should start taking notes in class and trying to learn. Above all, they should not give up without even trying.

1. The phrase "get themselves down" (Para. 1) probably means ______.

A. tell lies  

B. lose confidence    

C. avoid dangers    

D. waste time

2. When the two students dropped out (退学), no one took much notice because ______.

A. they had long lost heart in class performance

B. they were absent from class too often

C. they didn't get on well with other students

D. they were so much cut off from the rest of the class

3. According to the passage, the two students failed in their study because of their ______.

A. shyness    

B. proudness    

C. self-doubt    

D. laziness

4. The author thinks that the two students should ______.

A. give up their college education        

B. learn from other students

C. feel happy because they are in college      

D. try hard before giving up