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
高考英语满分作文精选:兽首拍卖(附翻译)
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2012高考英语满分作文:描述一次学校午餐
2015年高考英语作文热点词汇
高考英语满分作文:给房东留言(附名师点评)
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高考英语满分作文精选:我的家乡(附翻译)
高考英语满分作文:Green Action in Our Class(附名师点评)
2004年高考英语满分作文及名师评析:写信通知
高考英语满分作文精选:给父母的建议(附翻译)
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高考英语满分作文精选:我的朋友(附翻译)
2007年高考英语满分作文及名师评析:宾馆宣传
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高考英语满分作文:阳光体育发言稿名师点评
高考英语满分作文精选:Graduation and Moving on(附翻译)
2009年高考英语满分作文及名师评析:给房东的留言条
高考英语满分作文精选:伟大的奥运会(附翻译)
高考英语满分作文:回信(附名师点评)
高考英语万能写作模板
2008年高考英语满分作文及名师评析:给动物园工作人员的一封信
高考英语作文范文:校园活动
2005年高考英语满分作文及名师评析:咨询情况
高考英语满分作文精选汇总
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高考英语满分作文:慰问信(附名师点评)
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高考英语作文范文:减负之后
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