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以下属于信息世界的模型，且实际上是现实世界到机器世界的中间层次的是 ( )。
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利用数据库管理数据时把现实世界的事物及其之间的联系转换成机器世界的数据模型的一个中间环节是信息世界的
以下属于信息世界的模型且实际上是现实世界到机器世界的中间层次的是
数据库的概念模型独立于______
具体的机器和DBMS
E-R图
信息世界
现实世界
下列属于信息世界的模型且实际上是现实世界到机器世界的一个中间层次的是
数据模型
概念模型
E-R图
关系模型
__________________实际上贯穿了三个世界即现实世界—信 息世界—计算机世界
概念模型是指
实体概念模型在计算机中的数据化表示
将信息世界中的信息进行数据化
客观存在的事物及相互联系
现实世界到机器世界的一个中间层次，也就是信息世界
以下属于信息世界的模型且实际上是现实世界到机器世界的一个中间层次的是
数据模型
概念模型
E-R图
关系模型
属于信息世界的模型实际上是现实世界到机器世界的一个中间层次
数据模型
概念模型
对象模型
关系模型
所谓概念模型指的是______
客观存在的事物及其相互联系
将信息世界中的信息进行数据化
实体模型在计算机中的数据化表示
现实世界到机器世界的一个中间层次，即信息世界
所谓概念模型指的是
客观存在的事物及其相互联系
将信息世界中的信息进行数据化
实现模型在计算机中的数据化表示
现实世界到机器世界的一个中间层次，即信息世界
以下属于信息世界的模型且实际上是现实世界到机器世界的一个中间层次的是
数据模型．
概念模型
E-R图
关系模型
下列各题ABCD四个选项中只有一个选项是正确的 把电路中的所有元件如晶体管电阻二极管等都集成在一个
概念模型
逻辑模型
结构模型
物理模型
所谓概念模型指的是
客观存在的事务及其相互联系
将信息世界中的信息进行数据化
实体模型在计算机中的数据化表示
现实世界到机器世界的一个中间层次，即信息世界
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