Passage 2
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
名师指导六级写作如何临场发挥
12月英语四六级快速阅读技巧特殊信息点
大学英语六级词汇记忆子母词联想法
12月英语六级掌握预读技巧巧做听力选择题
破解英语六级考试阅读理解的三重境界
12月英语六级写作考场时间分配
如何写好英语作文
词汇拼写之英音与美音词汇区别
大学英语六级词汇切忌死记
名师指点六级写作如何下笔如有神
5月英语四级口语考试应试技巧
攻克英语四六级考试的秘诀
六级临考前做什么最有效
六级词汇的记忆法3
12月英语六级阅读冲刺如何应对时间不够
写作指导如何用简单句表达复杂思想
12月英语四六级考前注意事项
牛人经验分享如何考好六级
逆袭!英语六级成绩322分到453经验分享
六级词汇的记忆法2
六级学霸经验:利用真题高效复习
大学英语六级词汇记忆音意联想法
谈六级考试词汇记忆法
牛人分享备考诀窍大学英语六级638分
六级作文预测第22篇如何利用大学时光
大学英语六级词汇背诵时违背的三个科学的原则
六级考试作文是如何评分的
4月大学英语六级考前词汇的提升终极攻略
六级词汇的记忆法1
大一新生需注意英语六级考试误区
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |