问题 单项选择题

以下不属于数据库系统(DBS)的组成的是( )。

A.数据库集合

B.用户

C.数据库管理系统及相关软件

D.操作系统

答案

参考答案:D

解析:数据库系统是由5部分组成的:硬件系统、数据库集合、数据库管理系统及相关软件、数据库管理员(Data Base Administrator,DBA)、用户。

阅读理解

阅读理解

     One morning, Mr Smith comes into the garden at the back of his house. He sees much snow in the

garden. He wants to drive his car out, so he asks a man to clean the road from the garage(车库) to the

gate. He says to the man, "Don't throw any snow on that side. It will damage(损坏) the flowers in my

garden, and don't throw any on the other side, for it will damage the wall and don't throw any into the

street, or the policeman will come." Then he goes out.

     When Mr Smith comes back, the road is clean. There is no snow on the flowers, on the wall or in the

street. But when he opens the garage to get his car out, he sees the garage is full of snow and the car is

under the snow.

1. One morning, Mr Smith finds _____ is full of'snow.

A. his garage    

B. his car          

C. his garden        

D. his house

2. He wants a man to clean the road because           .

A. he doesn't like snow

B. he often asks the man to do it

C. he has no time to clean the road

D. he wants to drive his car out of the garage

3. Where does Mr Smith tell the man to throw the snow in the garden?

A. On the wall.                    

B. On the flowers.

C. We don't know.                  

D. Into the street.

4. When Mr Smith opens the garage, _       .

A. he finds it is full of snow          

B. he takes the snow out

C. he finds there is no car there        

D. he takes his car out

5. Mr Smith's car is           .

A. in the street

B. under the snow from the road

C. in front of his house

D. near the road

单项选择题