If you are like most people, your intelligence varies from season to season. You are probably a lot sharper in the spring than y

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问题     If you are like most people, your intelligence varies from season to season. You are probably a lot sharper in the spring than you are at any other time of the year. A noted scientist, Ellsworth Huntington (1876—1974) concluded from other men’s work and his own among peoples in different climates that climate and temperature have a definite effect on our mental abilities.
    He found that cool weather is much more favorable for creative thinking than is summer heat. This does not mean that all people are less intelligent in the summer than they are during the rest of the year. It does mean, however, that the mental abilities of a large number of people tend to be lowest in the summer.
    Spring appears to be the best period of the year for thinking. One reason may be that in spring man’s mental abilities are affected by the same factors that bring about great changes in all nature.
    Fall is the next-best season, then winter. As for summer, it seems to be good time to take a long vacation from thinking.
One possible reason why spring is the best season for thinking is that______.

选项 A、all nature, including man, is growing then
B、it lasts longer than the other seasons
C、it is not too warm and not too cold
D、both B and C

答案A

解析 第三段说:“对思考来说,春天似乎是一年中最好的阶段。其中原因之一也许是在春天里人的大脑能力受带给整个自然巨大变化的同样因素的影响。”我们知道,春天是万物复苏、生长的季节。由此我们可以看出,文中指的自然界的巨大变化是万物生长的意思,因此人也包含在其中。由此可知选项A正确。选项B、C、D均与文章内容不符。
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