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  3. As the baby-boomer generation contemplates the prospect of the Zimmer frame there has never been more interest in delaying the p

As the baby-boomer generation contemplates the prospect of the Zimmer frame there has never been more interest in delaying the p

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问题     As the baby-boomer generation contemplates the prospect of the Zimmer frame there has never been more interest in delaying the process of ageing. One consequence has been a(n) 【C1】______rise in the popularity of brain-training games. But how【C2】______ really is a daily dose of cryptic crossword?
    Robert Wilson, a neuropsychologist at Rush University in Chicago, and his colleagues decided to【C3】______out, 【C4】______following a group of people without dementia. Participants were asked to【C5】______ how frequently they engaged in cognitively【C6】______activities. The researchers were looking for such things as reading newspapers, books and magazines,【C7】______ challenging games like chess, listening to the radio and watching television, and【C8】______museums.
    The good news, as they report in Neurology, is that 【C9】______ activity of this sort seems to slow the rate of 【C10】______decline in those without cognitive【C11】______ . The bad news is that in those who do then develop Alzheimer’ s disease it is associated with a more rapid【C12】______decline.
    What seems to be happening is that cognitive stimulation helps 【C13】______the effect of the neurodegenerative lesions associated with dementia. It does not, 【C14】______, make them go away. They continue to【C15】______ , so that when the disease does eventually take【C16】______ there are more of them around than there otherwise would be, which results in a more 【C17】______cognitive fall off. That is not a message of despair, 【C18】______, because the length of time someone suffers from dementia is thus【C19】______and their healthy life prolonged. So the message is,【C20】______on with the crosswords.
【C11】
选项 A、obstacle
B、inclination
C、limitation
D、impairment
答案D
解析 考查名词辨析。第二段开头介绍：它们的研究对象是一组智力正常的人。据此推知此处指“无认知障碍者”，impairment意为“伤残，损伤”，cognitive impairment意为“认知障碍”，符合文意。故答案为D。obstacle“障碍”，多指具体的妨碍物；inclination“趋势，倾向”；limitation“限度，限制”，三项均不符合题意。
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