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
2016届高三英语一轮复习题组层级快练:(十三)外研版必修3
2016届高三英语一轮复习题组层级快练:(二十四)外研版必修4
2016届高三英语一轮复习题组层级快练:(三十一)外研版选修6
2016届高考英语一轮复习课时规范训练:Module4《Great Scientists》
2016届高三英语一轮复习题组层级快练:(三十九)外研版选修7
2016届高三英语一轮复习题组层级快练:(二十五)外研版必修5
2016届高考英语一轮复习课时规范训练:Module3《Music》外研版
2016届高三英语一轮复习题组层级快练:(二十九)外研版必修5
2016届高三英语一轮复习题组层级快练:(十二)外研版必修2
2016届高考英语一轮复习课件:第一部分模块复习方略 选修六 Unit17(北师大版)
2016届高三英语一轮复习题组层级快练:(三十二)外研版选修6
2016届高三英语一轮复习题组层级快练:(三十六)外研版选修6
2016届高三英语一轮复习题组层级快练:(三十五)外研版选修6
2016届高三英语一轮复习题组层级快练:(二十一)外研版必修4
2016届高三英语一轮复习题组层级快练:(七)外研版必修2
2016届高三英语一轮复习题组层级快练:(二十)外研版必修4
2016届高三英语一轮复习题组层级快练:(三十四)外研版选修6
2016届高三英语一轮复习题组层级快练:(三)外研版必修1
2016届高三英语一轮复习题组层级快练:(二十七)外研版必修5
2016届高三英语一轮复习题组层级快练:(二十三)外研版必修4
2016届高三英语一轮复习题组层级快练:(三十七)外研版选修7
2016届高考英语一轮复习课件:第一部分模块复习方略 选修七 Unit20(北师大版)
2016届高三英语一轮复习题组层级快练:(十六)外研版必修3
2016届高考英语一轮复习课件:第一部分模块复习方略 选修七 Unit19(北师大版)
2016届高考英语一轮复习课时规范训练:Module4《Fine Arts-Western,Chinese and Pop Arts》外研版必修2
2016届高三英语一轮复习题组层级快练:(二十八)外研版必修5
2016届高考英语一轮复习课件:第一部分模块复习方略 选修八 Unit22(北师大版)
2016届高三英语一轮复习题组层级快练:(十四)外研版必修3
2016届高考英语一轮复习课件:第一部分模块复习方略 选修六 Unit18(北师大版)
2016届高考英语一轮复习课时规范训练:Module3《My First Ride on a Train》
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |