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【单选题】
下列关于规范化理论各项中正确的是A.
对于一个关系模式来说,规范化越深越好
B.
一级范式要求每一非主码属性完全函数依赖关键字
C.
满足二级范式的关系模式一定满足一级范式
D.
规范化一般是通过分解各个关系模式实现的,但有时也有合并
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【单选题】Forget football. At many high schools, the fiercest competition is between Coke and Pepsi over exclusive 'pouring rights' to sell on campus. But last week Jeffrey Dunn, president of Coca-Cola Americas...
A.
the fiercest competition at high schools
B.
thought to have ill impact on students
C.
competing with commercials on campus
D.
brought into disrepute by Coke and Pepsi
【单选题】The author brings in the pairs of ' Coke and Pepsi, Target and Wal-Mart, Engadget and Gizmodo'(Para. 4)to make______.
A.
a comparison
B.
a contrast
C.
an abstraction
D.
an exemplification
【判断题】If Coke and Pepsi are substitutes, an increase in the price of Coke will cause an increase in the equilibrium price and quantity in the market for Pepsi.
A.
正确
B.
错误
【单选题】Forget football. At many high schools, the fiercest competition is between Coke and Pepsi over exclusive 'pouring rights' to sell on campus. But last week Jeffrey Durra, president of Coca-Cola America...
A.
the fiercest competition at high schools
B.
thought to have iii impact on students
C.
competing with commercials on campus
D.
brought into disrepute by Coke and Pepsi
【简答题】(3)Coke and Pepsi are the most popular b of cola.
【单选题】煤炭燃烧时会排放二氧化硫等污染物 , 为了减少污染物的排放 , 许多地方都使用了洁净煤 ( 如脱硫 ) 技术。读煤炭脱硫效率图 , 完成第8 ~9 题。 关于煤炭资源的叙述,正确的是
A.
人均煤炭资源不断减少,主要是因为人类的不合理利用
B.
煤炭是我国目前主要的能源消费形式
C.
煤炭主要是由海洋生物演化而来的
D.
我国南方各省级行政区域煤炭资源都很缺乏
【单选题】Forget football. At many high schools, the fiercest competition is between Coke and Pepsi over exclusive 'pouring rights' to sell on campus. But last week Jeffrey Dunn, president of Coca-Cola Americas...
A.
the fiercest competition at high schools
B.
thought to have ill impact on students
C.
competing with commercials on campus
D.
brought into disrepute by Coke and Pepsi
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