问题 单项选择题

下列条目中,哪些是DBMS的基本功能
Ⅰ.提供用户对数据库结构的描述功能
Ⅱ.提供用户对数据的操作功能
Ⅲ.提供多用户环境下的事务管理
Ⅳ.分类组织、存储和管理各种数据
Ⅴ.数据库的创建、转储和恢复

A.Ⅰ、Ⅱ和Ⅲ

B.Ⅱ、Ⅲ和Ⅳ

C.Ⅰ、Ⅱ、Ⅲ和Ⅳ

D.都是

答案

参考答案:D

解析: 数据库的功能模块包括数据库定义程序模块、数据库存取模块、数据库运行管理程序模块、数据库组织、存储和管理程序模块和数据库建立、维护模块。数据库运行管理方面的程序模块一方面保证用户事务的正常运行及其原子性,一方面保证数据库存取的安全性和完整性。

阅读理解

阅读下列短文,然后回答问题。

  Two Englishmen were in Boston for a visit. One morning, they went out to

look for a famous church, but they didn’t know how to get there. They stopped a

man and asked.  

  "Excuse me, can you tell us the way to the North Church?"

  "Go three blocks (街区)and turn to your left. he said,"you can't miss it."

        So the Englishmen walked three blocks and turned to their left. But they

didn't see any church. They then asked a second man. 

        "Excuse me , but we're trying to find the North Church." 

         This one said, "Go three blocks and turn to your left."But again they

couldn't find the church. In the end they asked a third man,"Excuse me, please,

could you tell us how to get to the North Church?"

         "Go three blocks and turn to your left, you can't miss it." 

         They walked three blocks and turned to their left for a third time. This time

they found the church.

         "Is everything in Boston three blocks and a left turn?" they asked

themselves.

         Just then a man walked over to them."Excuse me."the man said,"Where is

the East Park? can you tell me?"

        "Go three blocks and turn to your left,"one of the Englishmen said,

  "you can't miss it."

1. Where were the two Englishmen going?

______________________________

2. Did they know the way?

______________________________

3. What did the first man tell them?

______________________________

4. How many people did they ask the way?

______________________________

5. Do you think the two Englishmen know the way to the East park?

______________________________

单项选择题