If you are looking for information, library shelves are a good place to start. But if you need up-to-the-minute data or have specialized needs, you may find a computerized database more useful, less expensive, and less time 11 .A database, a file of information on one subject or family of subjects, can be stored and 12 in a computers memory. The speed of the computer then 13 you to recall any item in this file almost 14
The three main types of databases are statistical, bibliographic, and full text. Statistical databases store 15 amounts of numerical data, such as wage and price indexes, census information, foreign 16 rates and bond prices. Bibliographic databases store references to and summaries of articles in periodicals and newspapers. Full-text databases offer the complex texts of such 17 as newspaper, magazine, and journal articles.
Thousands of databases exist today, and their numbers are growing. Many companies have their in-house database, which is 18 to employees through computer terminals or microcomputers. In addition, several hundred commercial databases are now available to the 19 , with literally millions of items of information readily obtainable. These databases 20 specific fields, such as law and financial forecasting, or general information, such as sports and weather data.
A. exchange B. public C. instantly D. cover
E. enables F. consuming G. remained H. materials
I. hide J. intensively K. vast L. communications
M. exhausting N. accessible 0. maintained
II. F 12. O 13. E 14. C 15. K 16. A 17. H 18. N 19. B 20. D
2017全新教程高考英语总复习(人教版浙江专用)课件:语法专项训练(十二)
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 17~20篇首
浙江省2017高考英语二轮复习专题训练:单项选择(58)
人教版2017高考英语全套解析一轮复习课件:8-4 Pygmalion
2017全新教程高考英语总复习(大纲版)课件:SBⅠ Units 2 English around the world
浙江省2017高考英语二轮复习专题训练:单项选择(44)
人教版2017高考英语全套解析一轮复习课件:语法精要5 介词和介词短语
浙江省2017高考英语二轮复习专题训练:单项选择(57)
浙江省2017高考英语二轮复习专题训练:单项选择(46)
人教版2017高考英语全套解析一轮复习课件:语法精要3 代词
人教版2017高考英语全套解析一轮复习课件:8-5 Meeting your ancestors
人教版2017高考英语全套解析一轮复习课件:语法精要11 名词性从句
2017全新教程高考英语总复习(大纲版)课件:SBⅠ Units 1 Good friends
人教版2017高考英语全套解析一轮复习课件:语法精要8 非谓语动词
2017全新教程高考英语总复习(人教版浙江专用)课件:语法专项训练(十一)
2017全新教程高考英语总复习(大纲版)课件:SBⅠ Units 5 The silver screen
浙江省2017高考英语二轮复习专题训练:单项选择(59)
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 9 Saving the earth
人教版2017高考英语全套解析一轮复习课件:8-3 Inventors and inventions
人教版2017高考英语全套解析一轮复习课件:8-1 A land of diversity
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 19 The Merchant of Venice
人教版2017高考英语全套解析一轮复习课件:8-2 Cloning
2017全新教程高考英语总复习(大纲版)课件:SBⅠ Units 5~8篇首
人教版2017高考英语全套解析一轮复习课件:语法精要7 动词的时态和语态
浙江省2017高考英语二轮复习专题训练:单项选择(47)
浙江省2017高考英语二轮复习专题训练:短文改错+书面表达(1)
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 17 Disabilities
人教版2017高考英语全套解析一轮复习课件:语法精要1 名词
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 10 Frightening nature
2017全新教程高考英语总复习(大纲版)课件:SBⅡ Units 16 The United States of America
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