2. 外语
  3. Plugging into Electronic Databases If you are looking【C1】______information, library shelves are a good place【C2】______. But i

Plugging into Electronic Databases If you are looking【C1】______information, library shelves are a good place【C2】______. But i

admin2011-01-14  89
问题                  Plugging into Electronic Databases
   If you are looking【C1】______information, library shelves are a good place【C2】______. But if you need up-to-the-minute data or have specialized needs, you may【C3】______a computerized database more useful,【C4】______expensive, and less time consuming. A database, a file of【C5】______on one subject or family of subjects, can be【C6】______and maintained in a computer’s memory. The speed of the computer then enables you【C7】______any item in this file almost instantly.
   The three main types of databases are statistics, bibliographies, and full text. Statistical databases store vast【C8】______of numerical data, such as wages and price indexes, census information, foreign exchange rates, and bond prices. Bibliographic databases store references to and【C9】______of articles【C10】______periodicals and newspapers. Full-text databases offer the complete texts of such materials【C11】______newspaper, magazine and journal articles.
   【C12】______databases exist today, and their numbers are【C13】______Many companies have their【C14】______database,【C15】______is accessible【C16】______employees through computer terminals or microcomputers.【C17】______addition, several hundred commercial data bases are now available【C18】______the public,【C19】______literally millions of information readily retrievable. These databases cover specific fields, such as law and financial【C20】______, or general information, such as sports and weather data.
【C13】
选项 A、grown
B、grow
C、to grow
D、growing
答案D
解析 本题考查现在进行时态用法，be doing，所以答案为D。
转载请注明原文地址:https://kaotiyun.com/show/N35d777K
本试题收录于： 公共英语二级笔试题库公共英语（PETS）分类
0

公共英语二级笔试

公共英语（PETS）

相关试题推荐
随机试题
最新回复(0)