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If someone is sleepwalking, they are walking around while they are asleep. Sleepwalking happens when a person is not fully aslee
If someone is sleepwalking, they are walking around while they are asleep. Sleepwalking happens when a person is not fully aslee
admin
2018-07-12
42
问题
If someone is sleepwalking, they are walking around while they are asleep. Sleepwalking happens when a person is not fully asleep but not quite awake (清醒的). Usually we move from our deepest levels (层面) of sleep to a lighter level and stay there. Sleepwalkers come right up to wake levels but do not fully awaken. It is at this time that they get up and walk.
The longer a person stays in deep sleep, the more time there is for the sleep to be broken. That opens up the possibility (可能性) of being awakened (but not fully) and of sleepwalking.
Sleepwalking happens more often among young people than grown-ups because young people usually have more deep sleep. Up to 7% of 5 to 12-year-olds sleepwalk, while only about 2% of grown-ups sleepwalk. We get less deep sleep as we are getting older and the possibility of sleep- walking is also reduced.
Sleepwalking may run in families, too. If one of your parents was a sleepwalker, you have about a 50% possibility of also being a sleepwalker.
This text may come from ______.
选项
A、a storybook
B、a science book
C、a travel book
答案
B
解析
推理题。这是一篇解释梦游发生的原理及可能性的说明文,语言正式而严肃,由此可推测它很有可能是从科学书籍上选取的。故B选项符合题意。
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公共英语(PETS)
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