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【单选题】
关于主键描述错误的是A.
一个表只能有一个主键
B.
主键的值不能重复
C.
一个表有多个主键
D.
主键约束是一种重要的实体完整性约束
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反馈参考答案：
举一反三
【判断题】A dissonance-reducing buying behavior is designed to probe consumers' hidden, subconscious motivations.
A.
正确
B.
错误
【简答题】dissonance-reducing buying behavior
【单选题】Individuals will be more motivated to reduce dissonance when the attitudes are important or when they believe the dissonance is ________.
A.
directly related to their pay
B.
the work of a disgruntled coworker
C.
they are in control of the dissonance
D.
their supervisor is showing favoritism
E.
completely out of their control
【判断题】Dissonance-reducing buying behavior occurs when consumers are highly involved with an expensive, infrequent, or risky purchase but see a lot of difference among brands.
A.
正确
B.
错误
【判断题】Dissonance-reducing buying behavior typically occurs when a buyer sees little difference among brands but is highly involved with the purchase.
A.
正确
B.
错误
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