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Half of your brain stays alert and prepared for danger when you sleep in a new place, a study has revealed. This phenomenon is o
Half of your brain stays alert and prepared for danger when you sleep in a new place, a study has revealed. This phenomenon is o
admin
2020-03-01
20
问题
Half of your brain stays alert and prepared for danger when you sleep in a new place, a study has revealed. This phenomenon is often【C1】______ to as the "first-night-effect". Researchers from Brown University found that a network in the left hemisphere of the brain "remained more active" than the network in the right side of the brain. Playing sounds into the right ears (stimulating the left hemisphere) of【C2】______ was more likely to wake them up than if the noises were played into their left ears.
It was【C3】______ observed that the left side of the brain was more active during deep sleep. When the researchers repeated the laboratory experiment on the second and third nights they found the left hemisphere could not be stimulated in the same way during deep sleep. The researchers explained that the study demonstrated when we are in a【C4】______ environment the brain partly remains alert so that humans can defend themselves against any【C5】______ danger.
The researchers believe this is the first time that the "first-night-effect" of different brain states has been【C6】______ in humans. It isn’t, however, the first time it has ever been seen. Some animal【C7】______ also display this phenomenon. For example, dolphins, as well as other【C8】______ animals, shut down one hemisphere of the brain when they go to sleep. A previous study noted that dolphins always【C9】______ control their breathing. Without keeping the brain active while sleeping, they would probably down. But, as the human study suggests, another reason for dolphins keeping their eyes open during sleep is that they can look out for【C10】______ while asleep. It also keeps their physiological processes working.
A) classified I) potential
B) consciously J) predators
C) dramatically K) referred
D) exotic L) species
E) identified M) specifically
F) inherent N) varieties
G) marine O) volunteers H) novel
【C3】
选项
答案
M
解析
空格前为be动词,空格后为动词的过去分词形式,故本空需要填入一个副词。前文只提到当人们在一个新的环境睡觉时,大脑左半球会比大脑右半球活跃,并未提到睡眠深浅的问题,而此处提到“研究人员注意到人处于深度睡眠时大脑左半球更活跃”,这一句介绍的情况要比前文更详细、更具体。备选项中只有specifically(说明确些,具体来说)符合文义,故答案为M。
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0
大学英语六级
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