问题 单项选择题

数据库的物理设计是为一个给定的逻辑结构选取一个适合应用环境的 ______ 的过程,包括确定数据库在物理设备上的存储结构和存取方法。

A.逻辑结构

B.物理结构

C.概念结构

D.层次结构

答案

参考答案:B

解析:[评析] 根据数据库物理设计的概念可知:为一个给定的逻辑数据模型选取一个最合适应用要求的物理结构的过程,就是数据库的物理设计。数据库的物理结构就是指数据库在物理设备上的存储结构与存取方法。

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They’re WILD animals

By Ernst-Ulrich Franzen

March 11, 2010 (3) Comments

The story about the woman who lost some fingers while feeding a bear at a zoo in Manitowoc, after she ignored warnings and barriers(栅栏), reminded me of the story I heard about a couple who put their baby on the back of a wild horse in South Dakota to get a really cute picture. We all do silly things at times — no one is immune — but treating wild animals as lovely pets has to fall into a special category. Teddy bears and Disney movies aren’t actually representative of real bears.

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1. TosaLeft - Mar 11, 2010 10:46AM

Don’t you think that maybe, just maybe some alcohol was involved?

2. tk421 - Mar 11, 2010 11:09 AM

It was already approved that alcohol was involved. Stories that begin with a drunk person saying “Hey, I got an idea, watch this!” rarely end well.

3. Tristan Kloss - Mar 11, 2010 11:41 AM

Alcohol certainly isn’t involved when people decide to keep “pets” like chimpanzees, baby tigers, etc. Stupidity, definitely. Dogs are pets because of thousands of years of domestication. Even farm animals, which have been kept by humans for thousands of years as well, aren’t let in the house. So why keep animals that treat human contact with, at best, indifference(冷淡、不在乎) and, at worst, violence?

60.In Ernst-Ulrich Franzen’s opinion, the woman lost her fingers because ________.

A. the zoo keepers didn’t warn her of the danger       

B. she didn’t know the bear was a wild animal

C. she was somehow influenced by cartoon characters

D. she climbed over the barriers and angered the bear

61.TosaLeft thinks the wounded woman ________.

A. may have been drunk                                          B. may be a little stupid

C. was addicted to wine                                           D. fed wine to the bear

62.tk421 means a drunk person ________.

A. should be forbidden to enter the zoo                     B. usually gets himself into trouble

C. is often fond of making up stories                         D. usually likes to show himself off

63.What does Tristan Kloss think of people treating wild animals as pets?

A. Kind.                       B. Illegal.                                   C. Loving.                           D. Stupid.

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