题目内容

饮茶形成系统在()。

A. 汉代
B. 唐代
C. 宋代
D. 隋代

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With several hundred years of history behind it, the APL Bank has few problems in convincing businesses that it is a reputable and secure 1 of a range of banking services. Now, it is demonstrating to business customers that it is flexible and responsive enough to 2 their changing needs in the 21st century.Based in London, APL offers banking services to businesses throughout the UK via its branch 3. Most customer service provision is 4 out by personal account managers based in local branches, together with 5 staff at company headquarters.An important 6 for APL has been to make it easy for customers to 7 business with the bank. They can contact their account manager by direct line or email; if the manager is on holiday, a carefully chosen colleague becomes the “account contact” and 8 with the customer during the manager’s 9. In addition, for those who want 10 10 to their bank at any time of day or night there is now a 24-hour phone-based service.

规范化理论是关系数据库进行()的理论依据。

A. 概念设计
B. 逻辑设计
C. 物理设计

下面关于数据依赖的描述,不正确的是()

A. 数据依赖是现实世界属性间相互联系的抽象
B. 数据依赖是一个关系内容属性与属性之间的一种约束关系。
C. 数据依赖是数据内在的性质,是语义的体现
D. 数据依赖是两个主体之间的联系

关系数据库规范化的目的是使数据库的逻辑结构更合理,消除插入、删除、修改异常,减少数据冗余()

A. 对
B. 错

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