数据库系统在其内部分为三级模式,即概念模式、内模式和外模式。其中, 【4】 是用户的

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问题:

数据库系统在其内部分为三级模式,即概念模式、内模式和外模式。其中, 【4】 是用户的数据视图,也就是用户所见到的数据模式。

考点:计算机等级考试C语言二级C语言笔试
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我国的珍稀动物,除了被誉为________外,还有___________、__________、_________、_________、____________、___________都是国家一级保护动物。

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     It was the summer of 1965. Deluca, then 17, visited Peter Buck, a family friend. Buck asked Deluca

about his plan for the future. "I'm going to college, but I need a way to pay for it, " Deluca recalls saying. "Buck said, 'you should open a sandwich shop.'"

     That afternoon, they agreed to be partners. And they set a goal: to open 32 stores in ten years. After

doing some research, Buck wrote a check for $1,000. Deluca rented a storefront (店面) in Connecticut,

and when they couldn't cover their startup costs, Buck kicked in another $1,000.

      But business didn't go smoothly as they expected. Deluca says, "After six months, we were doing

poorly, but we didn't know how badly, because we didn't have any financial controls." All he and Buck

knew was that their sales were lower than their costs.

      Deluca was managing the store and to the University of Bridgeport at the same time. Buck was

working at his day job as a nuclear physicist in New York. They'd meet Monday evenings and brainstorm

ideas for keeping the business running. "We convinced ourselves to open a second store. We figured we

could tell the public, 'We are so successful; we are opening a second store.'" And they did-in the spring

of 1966. Still, it was a lot of learning by trial and error.

     But the partners' learnasyougo approach turned out to be their greatest strength. Every Friday,

Deluca would drive around and handdeliver the checks to pay their supplies. "It probably took me two

and a half hours and it wasn't necessary but as a result, the suppliers got to know me very well, and the

personal relationships established really helped out, " Deluca says.

      And having a goal was also important. "There are so many problems that can get you down. You

just have to keep working toward your goal, " Deluca adds.

     Deluca ended up founding Subways Sandwich, the multimilliondollar restaurant chain.

1. Deluca opened the first sandwich shop in order to ________.

A. support his family

B. pay for his college education

C. help his partner expand business

D. do some research

2. Which of the following is true of Buck?

A. He put money into the sandwich business.

B.He was a professor of business administration.

C. He was studying at the University of Bridgeport.

D. He rented a storefront for Deluca.

3. What can we learn about their first shop?

A. It stood at an unfavorable place.

B. It lowered the prices to poor management.

C. It made no profits due to poor management.

D. It lacked control over the quality of sandwich.

4. They decided to open a second store because they ________.

A. had enough money to do it

B. had succeeded in their business

C. wished to meet the increasing demand of customers

D. wanted to make believe(假装)that they were successful

5. What contributes most to their success according to the author?

A. Learning by trial and error.

B. Making friends with supplies.

C. Finding a good partner.

D. Opening chain stores.

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Sheehaa综合征时的闭经属于

A.垂体性闭经
B.子宫性闭经
C.下丘脑性闭经
D.卵巢性闭经
E.原发性闭经

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新生儿溶血病出现核黄疸的早期指征是()。

A.烦躁尖叫

B.角弓反张

C.惊厥

D.黄疸程度

E.嗜睡、肌张力低

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英国法中的“违反条件”和美国法中的“重大违约”的内涵相同,即是指由于债务人违约致使债权人不能得到该项交易的主要利益,因此债权人可以解除合同。()

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