
“长期储存在计算机内、有组织的、可共享的大量数据的集合”描述的是()
(1.0分)A . 数据库系统B . 关系数据库C . 数据库管理系统D . 数据库


“长期储存在计算机内、有组织的、可共享的大量数据的集合”描述的是()
(1.0分)A . 数据库系统B . 关系数据库C . 数据库管理系统D . 数据库
“长期储存在计算机内、有组织的、可共享的大量数据的集合”相关的问题
If you want to stay young, sit down and have a goodthink. This is the research
finding of a team of Japanese doctors, whosay that most of our brains are not getting enough exercise― and as a result,we are ageing unnecessarily soon.
Professor Taiju Matsuzawa wanted to find outwhy otherwise healthy farmers in northern
With a team of colleagues at
Computer technology enabled the research to obtainprecise measurements of the volume of the front and side sections of the brain,which relate to intellect and emotion, and determine the human character. (Therear section of the brain, which controls functions like eating and breathing,does not contact with age, and one can continue living without intellectual oremotional faculties.)
Contraction of front and side parts-as cellsdie off- was observed in some subjects in their thirties, but it was still notevident in some sixty-and seventy-year-olds.
Matsuzawaconcluded from his tests that there is a simple remedy to the contractionnormally associated with age― using the head.
The findingsshow in general terms that contraction of the brain begins sooner in people inthe country than in the towns. Those least at risk, says Matsuzawa, arelawyers, followed by university professors and doctors. While collar workersdoing routine work in government offices are, however, as likely to haveshrinking brains as the farm worker, bus driver and shop assistant.
Matsuzawa’s findings showthat thinking can prevent the brain from shrinking.
Blood must circulate properly in the headto supply the fresh oxygen the brain cells need. “The best way to maintain goodblood circulation is through using the brain,” he says, “Think hard and engagein conversation. Don’t rely on pocket calculators.”
1. The team of doctors wanted to find out_________.
A. why certain people age sooner than others
B. how to make people love longer
C. the size of certain people’s brains
D. which people are most intelligent
2. On what are their research findingsbased?
A. A survey of farmers in northern
B. Tests performed on a thousand old people
C. The study of brain volumes of different people
D. The latest development of computer technology
3. The doctor’s tests show that _________.
A. our brains shrink as we grow older
B. the front section of the brain does not shrink
C. sixty-year-olds have better brains thanthirty-year-olds
D. some people’s brains have contracted more thanother people’s
4. The word “subjects” in Paragraph 5 means__________.
A. something to be considered