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
考研
Researchers led by New York University neuroscientist Joseph LeDoux recently claimed to be the first scientists to erase a singl
Researchers led by New York University neuroscientist Joseph LeDoux recently claimed to be the first scientists to erase a singl
admin
2014-04-20
64
问题
Researchers led by New York University neuroscientist Joseph LeDoux recently claimed to be the first scientists to erase a single memory. Working with rats, LeDoux’s team first【B1】______the animals to fear both a beep and a siren【B2】______giving them an electric shock every time either of the tones sounded. Then LeDoux gave half the rats the drug U0126, which is known to【B3】______with memory storage, and replayed the beep【B4】______electric shocks.
A day later, when LeDoux【B5】______back both tones to the rats, the animals that hadn’t been given the drug were still fearful of both sounds.【B6】______the rats that had been given the memory-blocking drug weren’t【B7】______of the beep, which they had last heard while【B8】______the influence of U0126.
【B9】______how U0126 exerts its amnesiac effect is【B10】______, but it may block the synthesis of proteins that help strengthen【B11】______between neurons and establish memories. The opportunity for erasure【B12】______during the act of retrieving a memory, because that’s【B13】______the memory is being updated and【B14】______again for long-term storage. " Only those memories that are activated are【B15】______," LeDoux says.
Drugs like U0126 may someday【B16】______sufferers of traumatic memories. A small group of human studies have been done on a drug called propranolol, which blocks the action of stress neurotransmitters that help【B17】______memories in the brain, but LeDoux’s work shows the【B18】______for greater precision. " You might be able to【B19】______the traumatic impact of memories in people," says LeDoux. " The good news is you wouldn’t be【B20】______off their memory bank. "
【B14】
选项
A、enhanced
B、preserved
C、stabilized
D、declined
答案
C
解析
动词辨析题。我们可根据前文对实验过程的描述,了解记忆的发展过程。老鼠首先通过在昕声音时遭受电击而记住了对两种声音的恐惧感,从而建立了某种记忆。再次听见任何一种声音之前,这种记忆相对稳定地存在。直到再次听到声音时,记忆被激活,并且其中实验组的老鼠记忆被改变,而一旦刺激过去,这种记忆又稳定下来。可见记忆经历了稳定,激活更新,再次稳定的过程,由此可知[C]stabilized“稳定”符合前文描述,为本题答案。根据后文的for long—term storage“成为长期记忆”,易排除[D]declined“衰退”。前文没有提到记忆的“提升,强化”,故谈不到again“再次”提升,可见[A]enhanced“提高”不合题意,故排除。由于文中涉及的记忆一直存在,只是得到激活和更新,不应表述为再次保存,因此[B]preserved“保存”也应排除。
转载请注明原文地址:https://kaotiyun.com/show/pPO4777K
0
考研英语一
相关试题推荐
Writeanessayof160200wordsbasedonthefollowingdrawing.Inyouressay,youshould1)describethedrawingbriefly,2)
Theenergycontainedinrockwithintheearth’scrustrepresentsanearlyunlimitedenergysource,butuntilrecentlycommercial
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
AprovenmethodforeffectivetextbookreadingistheSQ3RmethoddevelopedbyFrancisRobinson.Thefirststepistosurvey(th
GeneralWesleyClarkrecentlydiscoveredaholeinhispersonalsecurity—hiscellphone.Aresourcefulblogger,hopingtocall
GeneralWesleyClarkrecentlydiscoveredaholeinhispersonalsecurity—hiscellphone.Aresourcefulblogger,hopingtocall
FlorenceNightingaleismostrememberedasapioneerofnursingandareformerofhospitalsanitationmethods.Formostofhern
Scientistsaroundtheworldareracingtolearnhowtorapidlydiagnose,treatandstopthespreadofanew,deadlydisease.SAR
随机试题
主轴箱主轴轴承间隙过大时,在主轴高速运转及切削力作用下,使轴承间摩擦力增加而产生摩擦热,使主轴箱温升过高而引起车床热变形。
儿童中度与重度烧伤的第一个24小时,按每1%面积每千克体重应补额外损失量
下列关于行政诉讼证据的说法,正确的是()
下列关于行政机关不履行法定职责的起诉期限的说法正确的是:()
监理人员的数量按每公里计算,一般应按0.4~0.8配备。()
材料:小红在小学时成绩优良,对数学特别感兴趣,还在数学竞赛中得过奖。升入初中后,学习内容增加且有些枯燥,她开始有些不感兴趣了。在第一次摸底测试中,她的成绩不理想,在班级的排名为30多名,回家又受到父母的责骂。这使她很有挫败感,她也想取得好成绩,但
《最高人民法院关于审理盗窃案件具体应用法律若干问题的解释》规定:各地高级人民法院可根据本地区经济发展状况,并考虑社会治安状况,在本解释规定的数额幅度内,分别确定本地区执行“数额较大”、“数额巨大”、“数额特别巨大”的标准。依据法理学的有关原理,下列表述正确
若输入“abcdef”、“abdef”,以下程序的输出结果为()。#include#includemain(){intn;chars1[20],s2[20],*p1,*p2;sca
Whilemanynationshaveagingpopulations,Japan’sdemographiccrisisistrulydire,withforecastsshowingthat40percentof
TheUnitedStatesisatypicalcountry
最新回复
(
0
)