问题 单项选择题

J.Martin将计算机的数据环境分为四种类型,按由高到低的层次依次为

A.应用数据库、主题数据库、信息检索系统、数据文件

B.信息检索系统、主题数据库、应用数据库、数据文件

C.信息检索系统、应用数据库、主题数据库、数据文什

D.主题数据库、应用数据库、信息检索系统、数据文件

答案

参考答案:B

解析:解析:J.Martin将计算机的数据环境分为4种类型,按由低到高的层次它 们依次为数据文件、应用数据库、主题数据库和信息检索系统。

阅读理解
任务型阅读。
I am      1     . Now I am studying French in Paris. I want to invent a language machine
that can help me understand as many languages as possible. 
                                                                                                       Jenny, England
I am a 13-year-old girl in Tibet. The Qinghai Tibet Railway has been built. I will be able to reach Beijing by train in about 48 hours. My dream is to go to Beijing to watch the
2008 Olympic Games. 
                                                                                                           Joma, China
I am 12 years old. I dream of inventing a machine that can send things or people from
one place to another in a minute
                                                                                                            Paul, Canada
I am a 14-year-old girl. I like traveling very much. How I wish to visit Australia some
day.
                                                                                                          Miyoko, Japan
NameNationality (国籍)AgeDream
ChinaThirteenTo watch the Olympic Games in 2008.
MiyokoJapanFourteen     2     
Paul     3      TwelveTo invent a fast moving machine
JennyEngland     4      To invent a language machine.
I am 15 years old, I like writing a lot. I dream of going to a top university after I
graduate, I want to be a      5      in the future and work for TCV or newspaper.
1.                        2.                   
3.                        4.                    
5.                 
多项选择题