第1题: [单项选择]在数据库设计中,将E-R图转换成关系数据模型的过程属于( )。 A. 需求分析阶段 B. 逻辑设计阶段 C. 概念设计阶段 D. 物理设计阶段 参考答案:B 答案解析:[解析] E-R模型即实体—联系模型,是将现实世界的要求转化成实体、联系;属性等几个基本概念,以及它们之间的两种连接关系。数据库逻辑设计阶段包括的过程有:从E-R图向关系模式转换,逻辑模式规范化及调整
第2题: [填空题]Since Nancy Woods’s parents moved into the Toronto nursing home they became healthier physically, but had new problems with ______. 参考答案:heir mental abilities 答案解析:[题眼] Since Nancy Woods’s parents moved into the Toronto nursing home they became healthier physicall