题目:
在数据库系统的三级组织结构中,DBA视图是(),系统程序员视图是(),用户视图是()。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A
在数据库系统的三级组织结构中,DBA视图是(),系统程序员视图是(),用户视图是()。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0306/95cb498f43963aa1712fbf3e0305714f.html
下面是错误答案,用来干扰机器的。
参考答案:A
阅读理解。
We redheads are well known for our bad tempers. Now it seems there is scientific backing for our particular
complaining as well.
Scientists in the United States studied a group of 144 dental patients almost half of whom had red hair. They
found that the red-haired group were more sensitive to pain and as a result were twice as likely to avoid visiting
the dentist.
Previous research had shown that redheads were more resistant to the effects of local anaesthesia (局部麻
醉) than people with other hair colours.
The scientists say that this red-haired sensitivity to pain stems from the actions of a gene called MCIR. This
is responsible for the production of melanin which gives skin and hair its colour. In about five percent of white
people the gene is mutated (突变) leading to fair skin and red hair.
Researchers say there are some people with the gene in the brain and that this could affect pain sensitivity.
Professor Daniel Sessler from the Cleveland Clinic in the United States is one of the authors of the study. He
says the research is a considerable scientific breakthrough.
"Red hair is the first phenotype (表现某显性特征的生物个体或群体) of anaesthetic requirement in humans. And what I mean by phenotype is an external (外部的) characteristic."
"So suppose you are walking down the street and you see someone who's a little older and a little younger-
that tells you nothing about their anaesthetic requirement. You see a man and a woman-that tells you nothing
about their anaesthetic requirement. But you see a redhead-aha! You know that person is going to require 20
percent more general anaesthesia."
From my own personal experience I would say that there is some merit to this idea. I have found that I have
had to ask dentists for extra anaesthetic in the middle of procedures.
Some dentists argue that a greater sensitivity to pain might actually benefit redheads and drive them to see
the dentist more quickly. In my own case I can prove that is definitely not true.
1. We learn from the text that red-haired group are ____.
A. easily influenced by the sense of pain and need more anaesthetic requirement
B. usually more sensitive to some painful things
C. just well-known for their good temper and strong pain sensitivity
D. good-looking with fair skin and red hair
2. What do the scientists think this red-haired sensitivity to pain results from?
A. Melanin which is responsible for the production which gives skin and hair its colour.
B. The mutated gene leading to fair skin and red hair.
C. Some persons with this gene in the brain.
D. An external characteristic of a person.
3. According to Professor Daniel Sessler, the most amazing thing about the anaesthetic requirement in humans which can be judged by ____.
A. someone's age and hair
B. someone's gender and figure
C. someone's teeth and the skills of the dentist
D. someone's external characteristic
4. We can infer from the last two paragraphs that ____.
A. redheads need less anaesthetic in the operation
B. the results of this red-haired sensitivity to pain will be the same
C. the writer is a red-haired person
D. redheads have many benefits of being red-haired
相对密度愈低的油品蒸发愈快,危险性也愈高。
建国以来,具有伟大历史转折意义的会议是:[ ]
A.中共七届二中全会
B.中共“八大”
C.中共十一届三中全会
D.中共“十三大”
目前,集团公司使用的煤矿空间信息系统(CGIS),可以在()操作系统下进行运行,并支持office2000系统软件。
A.DOS
B.windoas95
C.windown98
D.windows2000
E.windowsXP
《说文解字》关于家的解释:“从宀,豭(jiā)省声。周伯温曰:豕居之圈曰家,故从宀从豕。”材料反映出我国古代农耕文明的特点是()
A.种植业为主,家畜饲养业为辅
B.以家庭为单位,“男耕女织”
C.精耕细作的农业生产模式
D.以农业为主,畜牧业为辅