听力原文: In Hollywood, everybody wants to be rich, famous and beautiful. Nobody wants to be old, unknown and poor. For Hollywood kids, life can be difficult, because they grow up in such an unreal atmosphere. Their parents are ambitious and the children are part of the parents' ambitions. Parents pay for wasteful grand parties, expensive cars and designer clothes.
When every dream can come true, kids don't learn the value of anything because they have everything. A thirteen-year-old boy, Trent Maguire, has a driver, credit cards and unlimited cash to do what he wants when he wants to. "One day, I'll earn more than my dad!" he boasts. Parents buy care and attention for the children because they have no time to give it themselves. Amanda's mother employs a personal trainer, a bodyguard, a singing coach and a counselor to look after all her fifteen-year-old daughter's needs.
Often there is no parent at home most days, so children decide whether to make their own meals or go out to restaurants, when to watch television or do homework. They organize their own social lives. They play no childhood games. They become adults before they're ready. Hollywood has always been the city of dreams. The kids there live unreal lives where money, beauty and pleasure are the only gods. Will children around the world soon start to think the same? Or do they already?
Questions:
Why is life said to be difficult for Hollywood kids?
What does the speaker say about Trent Maguire, a thirteen-year-old boy?
Why does Amanda's mother employ other people to look after her needs?
What will probably have negative effects on the lives of Hollywood kids?
(33)
A.The atmosphere they live in is rather unreal.
B.Their parents put too much pressure on them.
C.It's hard for them to get along with other kids.
D.They have to live in the shadow of their parents.
第1题
设有关系模式R(A,B,C,D,E,F,G),根据语义有如下函数依赖集F={A→B,C→D,C→F,(A,D)→E,(E,F)→G}。关系模式R的码是【 】。
第2题
设有如下关系模式:R(A,B,C,D,E),其中R上函数依赖集为:F={(A,B)→E,E→C,C→D}。则在函数依赖的范围内该关系模式最高属于()。
A.1NF
B.2NF
C.3NF
D.BCNF
第3题
(17 ) 设有关系模式 R (A, B, C, D, E, F, G ) , 根据语义有如下函数依赖集 F={A → B,C → D ,
C → E (A,D ) → E ,(E,F ) → G } 。关系模式 R 的码是 【 17 】 。
第4题
设有关系模式R(A,B,C,D,E,F),根据语义有如下函数依赖集:F={A→B,(C,D)→A,(B,C)→D,(C,E)→D,(A,E)→F)。则关系模式R的候选码是()。
第5题
设有关系模式R(A, B, C, D, E, F),根据语义有如下函数依赖集:F={A→B,(C,D) →A,(B,C) →D,(C,E)→D,(A,E)→F)。则关系模式R的候选码是()。
A.(A,D, E)
B.(C,D,E)
C.(B,C)
D.(C,E)
第6题
设有如下关系模式:R(A,B,C,D,E),其中R上函数依赖集为:F={(A,B)→E,E→C,C→D}。则在函数依赖的范围内该关系模式最高属于
A.1NF
B.2NF
C.3NF
D.BCNF
第7题
设有如下关系模式:R(A, B, C, D, E),其中R上函数依赖集为:F={(A,B)→E, E→C, C→D}。则在函数依赖的范围内该关系模式最高属于
A.1NF
B.2NP
C.3NF
D.BCNF
第8题
设有关系模式R(A,B,C,D,E,F),根据语义有如下函数依赖集:F={A→B,(C,D) →A,(B,C) → D,(C,E)→D,(A,E)→F)。则关系模式R的候选码是()。
A.(A,D,E)
B.(C,D,E)
C.(B,C)
D.(C,E)
第9题
设有如下关系模式:R(A,B,C,p,E),其中R上函数依赖集为:F={(A,B)→E,E→C, C→D}。在函数依赖的范围内该关系模式最高属于()。
A.1NF
B.2NF
C.3NF
D.BCNF
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