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【单选题】
以下可以用来实现表间的数据库完整性的是( )。A.
视图
B.
索引
C.
表约束
D.
触发器
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反馈参考答案：
举一反三
【单选题】( )是指在几个成员国之间逐步消除贸易壁垒，实行自由贸易，进而实现生产要素在成员国之间的无障碍的流动，并为此而协调各个成员国之间的社会经济政策。
A.
贸易自由化
B.
区域经济一体化
C.
趋势一体化
D.
无政府主义
【单选题】( )是指在几个成员国之间逐步消除贸易壁垒,实行自由贸易,进而实现生产要素在成员国之间的无障碍的流动,并为此而协调各个成员国之间的社会经济政策。
A.
区域经济一体化
B.
贸易自由化
C.
趋势一体化
D.
无政府主义
【单选题】It is ________ to think a few of the students still don't take the reading homework seriously. [ ]
A.
disturbed
B.
disturbing
C.
interrupting
D.
interrupted
【单选题】—Who do you think is the most creative performer? —______. [ ]
A.
I think he does
B.
I don't think Pido is a dog
C.
I think Steve is the most creative performer
D.
Don't say so
【简答题】Dogs and cats are not for students who live in the dormitory. Just think about the noise, the smell and all that wild behaviorchewing on whatever they can get their teeth on, or knocking over the tra...
【单选题】—Who runs fastest _. all the students? —I think Wang Ping does. [ ]
A.
in
B.
of
C.
at
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