首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、They fought with the other mice. B、They stayed close to their mothers. C、They ran back and forth constantly. D、They remained c
A、They fought with the other mice. B、They stayed close to their mothers. C、They ran back and forth constantly. D、They remained c
admin
2013-05-19
33
问题
We’ve been looking at fear from a biological perspective, and someone asked whether the tendency to be fearful is genetic. Well, some studies done with mice indicate that mammals do inherit fearfulness to some degree. In one study, for instance, a group of mice was placed in a brightly-lit open box with no hiding places. Some of the mice wandered around the box and didn’t appear to be bothered of being so exposed. But other mice didn’t move. They stayed up against one wall, which indicated that they were afraid. Well, when fearful mice, or you might say anxious mice like the ones who stayed in one place, when mice like these were bred with one another repeatedly, after about 12 generations or so, then all of the offspring showed similar signs of fearfulness. And even when a new-born mouse from this generation was raised by a mother and with other mice who were not fearful, that mouse still tended to be fearful as an adult. Now why is this? Well, it’s thought that specific genes in an animal’s body have an influence on anxious behavior. These are genes that are associated with particular nerve-cell receptors in the brain. And the degree of overall fearfulness in the mammal seems to depend in large part on the presence or absence of these nerve-cell receptors. And this appears to apply to humans as well by the way. But while a tendency towards anxiety and fear may well be an inherited trait, the specific form that the fear takes has more to do with the individual’s environment. So a particular fear, like the fear of snakes or the fear of spiders, say, is not genetic, but the overall tendency to have fearful responses is.
Questions 33 to 35 are based on the passage you have just heard.
33. What is the talk mainly about?
34. How did some of the mice in the study demonstrate that they were afraid?
35. Why does the professor mention snakes and spiders?
选项
A、They fought with the other mice.
B、They stayed close to their mothers.
C、They ran back and forth constantly.
D、They remained close to one wall.
答案
D
解析
由A)中的other mice可知,they可能指的是mice。本题可能考查mice的行为活动。根据短文在描述有关老鼠的实验时提到:But other mice didn’t…which indicated that they were afraid可知,老鼠通过紧挨着墙壁的动作表现出了它们的恐惧,remained close to one wall与stayed up against one wall同义,故答案为D)。
转载请注明原文地址:https://kaotiyun.com/show/mbg7777K
0
大学英语四级
相关试题推荐
Thoughitisamereonetothreepercentofthepopulation,theupperclasspossessesatleast25percentofthenation’swealth
Forthispart,youareallowed30minutestowriteanessayentitledLivingExpenditureofCollegeStudents.Youshouldwritea
Ataroundageoffive,everychildhastomakethe【C1】______fromhometoschool.Childrenatthisagehaveanenormousamountto
Amongalltheanimals,theapeismostlikehumanbeings.Bothpeopleandapeshavethesimilarbrainstructure,thesimilarner
A、DoctorsbelievethatEdwardswasneverreallyblindordeaf.B、Edwardssawsomethingafterhewasstruck.C、Edwardslosthiss
Adultswhohadbeenfedplentyoffruitwhentheywerechildrenarelesslikelytosufferfromcertaintypesofcancer,British
Thestruggleagainstmalnutrition(营养不良)andhungerisasoldasmanhimself,andneveracrossthefaceofourplanethastheou
Manyprivateinstitutionsofhighereducationaroundthecountryareindanger.Notallwillbesaved,andperhapsnotalldeser
A、Uupset.B、Amused.C、Confused.D、Grateful.D细节题。从听力材料SheactuallythankedmeandsaidifIsentheracopyofthecorrectedtex
It’sanannualback-to-schoolroutine.Onemorningyouwavegoodbye,andthat【C1】______eveningyou’reburningthe;late-nightoi
随机试题
慢性肾炎氮质血症期患者饮食应注意的是
国有土地使用权因取得的方式不同分成()。
有限责任公司的设立要有()个股东,股份有限公司的设立要有()个以上的发起入股东。
化学与人类生产、生活、社会可持续发展密切相关,下列说法不正确的是()。
在采用收取手续费方式委托代销商品时,委托方确认商品销售收入的时点为()。
在面向对象的设计中,用来请求对象执行某一处理或回答某些信息的要求称为【】。
•Readthearticlebelowaboutthefunctionsofmoney.•ChoosethebestwordtofilleachgapfromA,B,CorD.•ForeachQue
CharlesDickensobservedofrevolutionaryFrancethatitwasthebestoftimesandtheworstoftimes,thespringofhopeandth
A、Puttinguppostersforherworks.B、Attendinganartclass.C、Decoratingherdormroom.D、Organizingaglobaltour.C选项均以现在分词开
A、Shebelievedthatherbabywouldnotbotheronherback.B、Shewantedtodosomehousework.C、Shecanmakethechildwarmer.D
最新回复
(
0
)