问题
单项选择题
用二维表结构表示实体及实体间联系的数据模型称为
A．网状模型
B．层次模型
C．关系模型
D．面向对象模型
答案
参考答案：C
解析：关系模型用来表示实体及实体间的联系。
搜题请搜索小程序“爱下问搜题”
用二维表结构表示实体及实体间联系的数据模型称为
A．网状模型
B．层次模型
C．关系模型
D．面向对象模型
参考答案：C
解析：关系模型用来表示实体及实体间的联系。
| 完形填空 | |||
| My name is Alice. I'm 11. 1 a little sister. She's 9. 2 name is Kate. We have different habits(习惯). I like 3 TV very much. I like to watch ping-pong games 4 TV. I think they're fun. I like vegetables, such as carrots, 5 and so on. I also like apples and eggs. They're good for us. Kate 6 running. She thinks it's interesting. But I think they're 7 . Kate doesn't like vegetables, 8 she likes French fries and ice cream. And she also likes hamburgers. I 9 think they're healthy. So I don't eat 10 . | |||
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