题目内容

The British established ______ colonies along the east coast of North America between 1607 and 1733.

A. 11
B. 12
C. 13
D. 14

查看答案

搜索结果不匹配？点我反馈

更多问题

设关系模式R(A,B,C) ，F是R上成立的FD集，F=B-C，则分解ρ=AB,BC相对于F______。

A. 是无损连接，也是保持FD的分解
B. 是无损连接，但不保持FD的分解
C. 不是无损连接，但保持FD的分解
D. 既不是无损连接，也不保持FD的分解

查看答案

Many movies receive ______ reviews from film experts and yet become extremely successful.

A. disparaging
B. authoritative
C. detailed
D. positive

查看答案

数据库的三级模式结构由外模式、模式和内模式组成，适合数据库类型有______。 Ⅰ．关系型数据库 Ⅱ．层次型数据库 Ⅲ．网状型数据库

A. 只有Ⅰ
B. Ⅰ和Ⅱ
C. Ⅱ和Ⅲ
D. 都适合

查看答案

The authors of the book suggest the use of deaf subject because ______.

A. deaf people are generally introversive
B. the auditory sense is an important factor in food evaluation
C. they are more fastidious in their choice of foods
D. all types of subjects should be used

查看答案

The British established ______ colonies along the east coast of North America between 1607 and 1733.

A. 11 B. 12 C. 13 D. 14

设关系模式R(A,B,C) ，F是R上成立的FD集，F=B-C，则分解ρ=AB,BC相对于F______。

Many movies receive ______ reviews from film experts and yet become extremely successful.

数据库的三级模式结构由外模式、模式和内模式组成，适合数据库类型有______。 Ⅰ．关系型数据库 Ⅱ．层次型数据库 Ⅲ．网状型数据库

The authors of the book suggest the use of deaf subject because ______.

A. 11
B. 12
C. 13
D. 14