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  3. All types of stress study, whether under laboratory or real-life situations, study mechanisms for increasing the arousal level o

All types of stress study, whether under laboratory or real-life situations, study mechanisms for increasing the arousal level o

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问题     All types of stress study, whether under laboratory or real-life situations, study mechanisms for increasing the arousal level of the brain.
    The brain blood flow studies show that reciting the days of the week and months of the year increases blood flow in appropriate areas, whereas problem solving which demands intense concentration of a reasoning type produces much larger changes in the distribution of blood in the brain.
    Between these basic studies of brain function and real life situations there is still a considerable gap, but reasonable deduction seems possible to try and understand what happens to the brain. Life consists of a series of events which may be related to work or to our so called leisure time. Work may be relatively automatic—as with typing, for instance, it requires intense concentration and repetition during the learning phase to establish a pattern in the brain. Then the typist’s fingers automatically move to hit the appropriate keys as she reads the words on the copy.
    However, when she gets tired she makes mistakes much more frequently. To overcome this she has to raise her level of arousal and concentration but beyond a certain point the automatic is lost and thinking about hitting the keys leads to more mistakes.
    Other jobs involve intense concentration such as holding bottles of wine up to a strong light and turning them upside down to look for particles of dirt falling down. This sounds quite easy but experience teaches that workers can do this for only about thirty minutes before they start making a mistake. This is partly because the number of occasions with dirt in the bottle is low and the arousal level, therefore, fails. Scientists have shown that devices to raise arousal level will increase the accuracy of looking for relatively rare events. A recent study of the effect of loss of sleep in young doctors showed that in tests involving a challenge to their medical judgment when short of sleep they raised their arousal level and became better at tests of grammatical reasoning as well.
What cannot we infer from reading this article?
选项 A、Some knowledge concerning how to increase the arousal level of the brain might help one in both work and life.
B、Problem solving which demands intense concentration of a reasoning type produces the same level of stress to a person as repetitive tasks.
C、For pretty automatic tasks as typing, appropriate interval breaks and adequate sleeps are necessary for typists to decrease error rates.
D、There is a considerable gap between basic studies of brain and real life matters. However it is probably bridged over by understanding actual function process of the brain.
答案B
解析 事实辨认题。答题依据是文章第二段，需要进行推理的工作会提高人脑中的血液流量，故而压力程度不可能等同于简单重复性的工作，故B是正确答案。
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