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医学
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of n
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of n
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2022-06-22
1
问题
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep.【C1】________kind of sleep is at all well-understood, but REM sleep is【C2】________to serve some restorative function of the brain. The purpose of non-REM sleep is even more【C3】________. The new experiments, such as those【C4】________for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations【C5】________of non-REM sleep.
For example, it has long been known that total sleep【C6】________is 100 percent fatal to rats, yet,【C7】________examination of the dead bodies, the animals look completely normal. A researcher has now【C8】________the mystery of why the animals die. The rats【C9】________bacterial infections of the blood,【C10】________their immune systems—the self-protecting mechanism against disease—had crashed.
【C3】
选项
A、subtle
B、obvious
C、mysterious
D、doubtful
答案
C
解析
本题考查上下文理解。根据上下文推断,上句说人们对两种睡眠知之甚少,所以可推断非REM睡眠的目的是更加神秘的,C选项mysterious意为“神秘的”,故选C。
转载请注明原文地址:https://kaotiyun.com/show/gWH3777K
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