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【简答题】
假设存在关系模式: R (,姓名,性别,班级,班主任,课程号,课程名,学时数,成绩),请分析此模式的主码和所存在的函数依赖,并指明属于哪种依赖(即完全函数依赖、部分函数依赖和传递函数依赖)
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【单选题】No woman can be too rich or too thin. This saying often attributed to the late Duchess (公爵夫人 )of Windsor embodies much of the odd spirit of our times. Being thin is deemed as such a virtue. The proble...
A.
religious people are not necessarily virtuous
B.
looking slim is a symbol of having a large fortune
C.
being thin is viewed as a much desired quality
D.
the Duchess of Windsor is regarded as a woman of virtue
【简答题】高速公路建设项目必须按照国家有关规定实行项目资本金制度、（）、合同管理制度、（）和（）。
【简答题】Decision- can be extremely difficult. Decision- styles are significantly different in different cultures. In any approach to a problem and in any negotiations, the Western world turns to t...
【单选题】● (73) is a category assigned to products or services having the samefunctional use but different technical characteristics. It is not same asquality.
A.
Problem
B.
Grade
C.
Risk
D.
Defect
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