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
中国将推国产网络百科全书
美国会警告各大航空公司改善客服
假定你是李华,是某国际学校的一名高三学生。请用英文跟你的美国朋友克里斯写一封电子邮件求助,要点如下:
亲诚惠容结善缘,周边外交续新篇
Many people think dreams are full of messages 阅读理解答案
国际英语资讯:Merkel: G20 to further promote globalization, inclusive growth
国内英语资讯:Xi stresses rule of law, cultivating legal talent
法杂志刊登凯特裸照 英王室索赔150万欧元
印度官员发木棒供新娘自卫 酒后家暴的丈夫该打
法国总统候选人辩论火爆
特朗普好心累,被弹劾的可能性越来越大了
咖啡英语超级大科普
米歇尔 奥巴马声称永远不会竞选美国总统
江西省南昌十九中2016-2017学年高一上学期第二次月考(12月)英语试题 Word版含答案
美国众议院批准政府预算案
美国人为了更快地学外语,居然要改造大脑?
觉得自己的工作毫无意义?越来越多人这么想
国内英语资讯:China acts on forex-related violations
假定你是李华, 得知你的英国笔友John获得了在伦敦举行中学生中文演讲比赛一等奖。你为他感到骄傲, 并给他写一封祝贺信
The London Underground (The Tube)阅读理解答案
高中生面临沉重的学习压力,因此,很多同学课间休息时间也坐在教室里学习,但效果并不理想。就此,
It won't wash 没有说服力
美文欣赏:值不值得,只有自己能衡量
Hero hounds 英雄猎犬
Book sales hit a record as children's fiction gains in popularity 儿童小说帮助英国图书销量创下新高
“运动药丸”有望取代健身房
格斗狂人十秒击败太极大师 多位功夫高手向其下战书
国际英语资讯:Trump says hes committed to helping solve Israeli-Palestinian conflict
国内英语资讯:Belt and Road Initiative has great global influence: Argentine Ambassador
牛粪时装:荷兰设计师将牛粪改造成时装
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