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问题 单项选择题

数据库管理系统 DBMS 中用来定义模式、内模式和外模式的语言为( )。

A．C

B．Basic

C．DDL

D．DML

答案

参考答案：C

解析：选项A)、选项B)显然不合题意。数据定义语言(Data Definition Language，简称DDL)负责数据的模式定义与数据的物理存取构建；数据操纵语言(Data Manipulation language，简称DML)负责数据的操纵，包括查询及增、删、改等操作。

完形填空

短文填空 先通读下面的短文，掌握其大意，然后根据短文内容和所给首字母，          在空格内填入一个适当的词，使短文意思完整。所填单词在答题卷上必须完整写出。 (本大题共5分，每格0.5分)

There are many ways to find a job. It can be as easy as w  小题1:  into a neighborhood shop to look at its announcement(通知) board. Local shops often have a  小题2:  where people can put small signs telling what kind of service they need or can provide. Such services include c  小题3:  for children or cleaning houses.

Or, job searchers can look in the newspaper. Local newspapers have employment（招聘） announcements placed by companies looking for workers.

Another p  小题4:  tool for finding jobs is the Internet. For example, people in four hundred and fifty cities around the world can use the Craigslist Web site to buy things, meet people or find a job. Craigslist says that it r  小题5:  two million new job listings each month.

Another useful way to find a job is t  小题6:  a college or university. For example, students at the University of Texas in Austin can go to the Career Exploration Center to get help in finding a job. Of course, looking for a job r  小题7:  knowing what kind of work you want to do. For example, there is a book called “What Color is Your Parachute?” by Richard Bolles. This book has been helping people c  小题8:  a career since it was first published(出版) in nineteen seventy.

Some experts also help people find jobs. Susan W. Miller o  小题9:  a company called California Career Services in Los Angeles. She says her company helps people find jobs by first helping them understand their strengths, goals and i  小题10:. Then she provides them with methods and resources(资源) to help them find the right job.
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单项选择题

引起输尿管扩张的最常见原因是

A．输尿管肿瘤

B．输尿管结核

C．输尿管结石

D．腹膜后肿瘤

E．输尿管畸形
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