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
民主党人琼斯在阿拉巴马州参议员选举中获胜
外媒称鹿晗为“中国的贾斯汀·比伯”,对他的评价会太高吗?
体坛英语资讯:Athletes of U.S., Armenia win golds of total at weightlifting worlds
调查显示对性别差异的刻板印象犹存
全球三分之一的儿童营养不良或过胖
抢先看!2018年度色彩如此神秘又高科技
国外掀起新的咖啡"健康喝法"
2017年12月英语六级作文范文:宿舍分配新规则
重磅!《权游》完结季将于2019年回归
如何在工作中应对精神创伤
2017年12月英语四级作文万能模板:提出最终建议
国际英语资讯:Russian Defense Ministry denies taking credit for IS defeat
为什么短裤和长裤一样贵?
电子烟健康危机:导致肺部疾病和癫痫
研究表明 健康行为也会像疾病一样传染
体坛英语资讯:Real, Valencia both win in Saturdays La Liga
体坛英语资讯:Wolfsburg share spoils with Hoffenheim in Bundesliga
2017年12月大学英语四级作文预测(上篇):各类通知的写法
研究发现 地中海饮食或仅对富人有效
索马里发生自杀炸弹袭击数人丧生
LV母公司投资了一个新潮流品牌,关注心理健康
小测验 - 英语单词中的前缀和后缀
Lost In Disneyland 迷失在迪士尼
好莱坞一线明星齐发声!联合抵制性骚扰
星巴克咖啡师试图赶走付过钱的流浪汉
2017年12月英语四级作文范文:经常更换工作
The Improvement of Chinese Football Team 国足的进步
I Love My Country 我爱我的祖国
因前男友相识!赛琳娜和霉霉闺蜜情长达12年
国内英语资讯:China asks WTO members to safeguard multilateral trade
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |