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、To show the relationship between fearfulness and environment. B、To give examples of animals that aren’t fearful. C、To compare
A、To show the relationship between fearfulness and environment. B、To give examples of animals that aren’t fearful. C、To compare
admin
2013-05-19
78
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、To show the relationship between fearfulness and environment.
B、To give examples of animals that aren’t fearful.
C、To compare fear in mammals to fear in other animals.
D、To identify the nerves that control fear in certain animals.
答案
A
解析
选项均以“To+do”开头,以及其中的show the relationship,give examples,compare等表明,本题可能考查举例子的目的。根据短文中提到的…the fear...has more to do with...environment.So...fear...like the fear of snakes or the fear of spiders…可知,教授提到蛇和蜘蛛是为了举例说明恐惧与环境之间的关系,故答案为A)。
转载请注明原文地址:https://kaotiyun.com/show/1bg7777K
0
大学英语四级
相关试题推荐
Scientistshavedevelopedanewcancerdrug.Sofar,theyhavetasteditonlyon【B1】______animals.Thedrugisdesignedto【B2】__
Inrecentyearsanewfarmingrevolutionhasbegun,onethatinvolvesthe【C1】______oflifeatafundamentallevel--thegene.The
Forthispart,youareallowed30minutestowriteashortessayentitledagingofthepopulation.Youshouldwriteatleast150
A、Becauseitisagainstthelaw.B、BecausethemanisnotamemberofTerry’sfamily.C、Becausethewomancannotfindthetest.
A、Differencesandsimilaritiesbetweentwocultures.B、Americanculture.C、Japaneseculture.D、Theintegrationoftwocultures.
Euthanasia(meaning"easydeath"inGreek)istheactofinducingagentle,painlessdeath.Inrecent【B1】______thetermhascom
Thisofficial____________(抵制住金钱的诱惑)andisloyaltobothhispeopleandcountry.
A、Takeadifferentbus.B、Goshoppingatthenewstore.C、Findanewrepairgarage.D、Buyadifferentcar.Dthewoman建议theman
Thestruggleagainstmalnutrition(营养不良)andhungerisasoldasmanhimself,andneveracrossthefaceofourplanethastheou
A、Anenginero6m.B、Abigkitchen.C、Agreattheatre.D、Ahighbuilding.C题目询问喷气式飞机内部看起来像什么。关键是听到“这种大型喷气式飞机的内部看上去更像一个大剧院”,故选项C正确
随机试题
某批发兼零售文具店规定:购买相册50本起可按批发价出售,批发价比零售价每本便宜2元。老张原计划采购相册若干本,总价为n元(n<400),后又多买12本,则可按批发价结算,也恰好只要n元,则批发价是每本()元。
肝性脑病患者灌肠或导泻时应禁用
药物致畸的敏感期是
红胜商场采用零售价格法计算期末存货成本。本月月初存货成本为10000元,售价总额为15000元;本月购入存货成本为50000元,相应的售价总额为60000元;本月销售收入为50000元。该商场本月销售成本为()。
“山重水复疑无路,柳暗花明又一村”。该诗句所隐藏的观赏方法是()。
我国北斗卫星导航系统与美国GPS、俄罗斯格洛纳斯、欧洲伽利略系统并称全球四大卫星导航系统。()
从某种意义上来说,大脑就像肌肉一样,如果_______锻炼某个部分,就会使该区域增强。科学家发现小提琴演奏家的大脑中用来控制左手的区域远大于常人,因为左手按压琴弦的工作比较________,而右手拉弓弦则相对简单。同样,阅读盲文的盲人,其大脑中很大的区域_
We’veallhadworkanddothingsthatwedidnotenjoy.Usually,somepeoplewouldtellustobe【C1】______enthusiastic(热情的)."Yo
DisplaystokeepaneyeonANewdisplaysarestartingtoappearinconsumerdevices,offeringadvantagesovertoday’sliquid-
A、Thehousingsector.B、Thetourismsector.C、Themanufacturingsector.D、Theservicesector.D在回答男士关于今年职场前景如何这一问题时,女士说由于房地产等产业的
最新回复
(
0
)