2. 外语
  3. 　　If you are looking【C1】________information, library shelves are a good place【C2】________. But if you need up-to-the-minute data

　　If you are looking【C1】________information, library shelves are a good place【C2】________. But if you need up-to-the-minute data

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问题 　　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 (书目), and full text. Statistical databases store vast【C8】________of numerical (数字的) data, such as wage and price indexes, census (人口普查) information, foreign exchange rates, and bond prices. Bibliographic databases store references and【C9】________of articles【C10】________periodicals and newspapers. Fulltext 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【C14】________their in-house database,【C15】________is accessible【C16】________employees through computer terminals or microcomputers.
　　【C17】________addition, several hundred commercial data bases are now available【C18】________the public, with literally millions of information readily retrievable (可检索的). These databases cover specific【C19】________, such as law and financial【C20】________, or general information, such as sports and weather data.
【C17】
选项 A、On
B、In
C、To
D、At
答案B
解析 in addition为固定搭配，表示“另外”，故选B。
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