按英文习惯将下列单词排序
A: city
B: zip code
C: country
D: the street number
E: the street
F: area(地区)
A: city
B: zip code
C: country
D: the street number
E: the street
F: area(地区)
举一反三
- 已知关系模式R(city,street,zip)其中city为城市编号,street为街道编号,zip为邮政编码,一个城市的一条街道只有一个邮政编码,一个邮政编码只属于一个城市,这个关系模式的主码是 A: city B: zip C: street D: 三个列的组合
- Border is to country as () A: perimeter is to object B: land is to owner C: road is to street D: area is to volume E: capital is to state
- The business street in the Back Mountain and Back River area is called ______. A: Hangzhou Street B: Suzhou Street C: Yangzhou Street
- You should write down the country code, the area code and the number if you need to fax.
- 已知关系模式 R(city, street, zip)其中 city 为城市编号,street 为街道编号,zip 为 邮政编码,一个城市的一条街道只有一个邮政编码,一个邮政编码只属于一个城市,这个关系模式的主码是