题目内容
阅读理解
If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise－and as a result, we are growing old unnecessarily soon.
Professor Taiju Matsuzawa wanted to find out why quite healthy farmers in northern Japan appeared to be losing their ability to think and reason at a rather early age, and how the speed of getting old could be slowed down.
With a team of researchers at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages with different jobs.
Computer technology helped the researchers to get most exact measurements of the volume of the front and side parts of the brain, which have something to do with intellect(智力) and feeling, and decide the human character. As we all know, the back part of the brain, which controls tasks like eating and breathing, does not contract(萎缩) with age.
Contraction of front and side parts－as cells die off－was seen in some people in their thirties, but it was still not found in some sixty and seventy－year－old people. Matsuzawa concluded from his tests that there is a simple way to prevent the contraction－using the head.
The findings show that contraction of the brain begins sooner in people in the country than in the town. Those with least possibility, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing the same work day after day in government offices are, however, as possible to have contracting brains as the farm workers, bus drivers and shop assistants.
1．The team of doctors wanted to find out ________.
[ ]
A．at what point people grow mentally old
B．how to make people live longer
C．the size of certain people's brains
D．which people are the most clever
2．Their research findings are based on ________.
[ ]
A．an examination of farmers in northern Japan
B．tests given on a thousand old people
C．examining the brain volumes of different people
D．using computer technology
3．The doctor's tests show that ________.
[ ]
A．our brains contract as we grow older
B．one part of the brain does not contract
C．sixty－year－old people have better brains than thirty－year－olds
D．some people's brains have contracted earlier than other people' s
4．The most possible conclusion of the passage is that ________.
[ ]
A．most of us should take more exercise
B．it's better to live in the town
C．the brain contracts if it is not used
D．the more one uses his brain, the sooner he becomes old
解析：
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1．C 医生们想搞清楚人脑变老的原因及其是怎样发生的。 2．C 段落理解题。医生的研究发现是基于对不同的人的脑容量的测量。从第三、四段的论述推断出此答案。 3．D 段落理解题。从文章第七段中对各种人群的测量结果中得出此项概括论述。B项易被误选，虽然它是事实，但不是医生的试验所表明的。 4．C 文章内容概括题。通读全文可得出此结论。尤其在第二、六、七段中表达更明确。A项易被误选。文章开始就讲明是脑子的锻炼，并非指一般的锻炼。 |
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