分析 本文属于说明文阅读,作者通过这篇文章向我们介绍了关于我们为什么在新的地方睡不好觉的原因,在我们睡觉的时候一半的大脑仍然保持清醒.
解答 51.B 推理判断题,根据第四段The researchers measured brain waves (测量脑波) for 35volunteers over two nights in a laboratory.The two nights were a week apart (间隔)可知研究人员对志愿者测试脑波超过两晚,而这两次中间有一周的间隔,由此推知,一共测试了两次,故选B.
52.D 细节理解题,根据第四段They found during the first night the left half of the brain was more active than the right half.This was during the first deep-sleep period,the researchers said.可知研究人员发现在第一次深睡眠期间大脑左半部更活跃,故选D.
53.C 细节理解题,根据倒数第二段Researchers did not keep measuring brain waves all night long.So,they don't know if the left half keeps"watch"all night,or whether it"works in shifts (轮换) with the right half later in the night"可知如今仍然存在的问题是研究人员没有整夜测量,因此他们不知道是左大脑一直活跃还是与右大脑替换,故选C.
54.A 词义猜测题,根据 最后一段For some,this research may be calming.It is good to know that our brain is"looking out for us"in a new place.可知对于一些方面来说是令人高兴的,知道我们的大脑在为我们寻找一个新地方是好的,故选A.
55.D 主旨大意题,根据第一段Have you ever had trouble sleeping in a new place以及通读全文可知作者通过这篇文章主要向我们介绍了为什么我们在新地方睡不好觉的原因,故选D.
点评 考查学生的细节理解和推理判断能力.做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确选择.在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
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