问题 单项选择题

下列关于面向对象数据库和关系数据库系统的叙述中,哪一条是不正确的

A.面向对象数据库设计与关系数据库设计之间一个最主要的区别是如何处理联系

B.面向对象数据库设计与关系数据库设计中,处理继承的方法是相同的

C.在面向对象数据库中,通过使用继承构造来获得映射

D.在面向对象数据库中,联系是通过使用联系特性或者包括相关对象的对象标识符的参照属性来处理的

答案

参考答案:A

阅读理解

阅读理解。

     An Englishman was showing a foreign visitor around London. "What's that strange building?" asked the

visitor. "That's the Tower of London." "I see. How long did it take to build it?" "About 500 years." "In my

country we can build it in five months," Shortly after that they came to St. Paul's Cathedral(大教堂). "Very

interesting!" said the visitor. "How long did it take to build it?" "Near forty years." said the Englishman. "In

my country we can finish it in forty days at most," aid the visitor. This went on all day. 

     They visited most of the best known buildings in the city. Every time they saw a new one, the visitor

asked what it was and how long it took to build it. Then he said that they could do the same thing much

faster in his country.

     At last the Englishman got angry with the visitor though he tried not to show it. Several days later they

came to the House of Parliament (议会 )and the visitor asked his usual question, "What is that?" The

Englishman answered," I have no idea. It wasn't there last night."

1. The Englishman showed the foreign visitor around ______ one day.[ ]

A. The Tower of London

B. St. Paul's Cathedral

C. Some famous buildings in the city

D. The whole city of London

2. The visitor said that in his country it would take them ______ to build the Tower of London. [ ]

A. less than half a year

B. forty days

C. five hundred years

D. fifty days

3. It took them a few days to see ______. [ ]

A. some of the best known buildings in England.

B. several best known places in England

C. many famous houses in the city of London

D. most of the best known buildings in London

4. The Englishman was angry by the end of the day, but he ______. [ ]

A. didn't want to say anything

B. tried to show it to the visitor

C. had no time to tell the visitor

D. tried not to show it to the visitor

5. The Englishman's answer to the question of the last place showed ______. [ ]

A. he was sorry that he hadn't seen the building before

B. he could say nothing because he didn't know anything about it

C. he was angry and didn't want to tell the visitor its name

D. he didn't know how to tell the visitor the name of the building

单项选择题