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
88
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. "
【B2】
选项
A、in
B、at
C、upon
D、by
答案
D
解析
介词辨析题。本空前后分句结构并不复杂,但信息量较大,解题关键在于正确理解前后文意,并理清前后信息的相互关系。空格前指出研究小组要让老鼠对两种声音都产生恐惧感,空格后则说明了让老鼠产生这种恐惧感的具体做法,故后文是说明方式的,而四个选项中只有by才能引导方式状语,故[D]为答案。[A]in表示“在内部或在某范围之内”,显然不符合题意。[B]at表示“在具体的地点或时间”,也可表示“朝着具体的方向”,也不符合此处文意。而[C]after则表示“在……之后”,说明的是时间关系,而不是方式,故也应排除。
转载请注明原文地址:https://kaotiyun.com/show/6JO4777K
0
考研英语一
相关试题推荐
Youwereknockeddownbyataxitheotherday;apasser-bysentyoutothehospital.Writealettertothepersontoexpressyou
Theenergycontainedinrockwithintheearth’scrustrepresentsanearlyunlimitedenergysource,butuntilrecentlycommercial
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
Guthrie’scontiguityprincipleofferspracticalsuggestionsforhowtobreakhabits.Oneapplicationofthethresholdmethod
HereisaquickwaytospoilaBrusselsdinnerparty.SimplysuggestthatworldgovernanceisslippingawayfromtheG20,G7,G8
ThefirsttechnologicalrevolutioninmodernbiologystartedwhenJamesWatsonandFrancisCrickdescribedthestructureofDNA
GeneralWesleyClarkrecentlydiscoveredaholeinhispersonalsecurity—hiscellphone.Aresourcefulblogger,hopingtocall
FlorenceNightingaleismostrememberedasapioneerofnursingandareformerofhospitalsanitationmethods.Formostofhern
FlorenceNightingaleismostrememberedasapioneerofnursingandareformerofhospitalsanitationmethods.Formostofhern
Scientistsaroundtheworldareracingtolearnhowtorapidlydiagnose,treatandstopthespreadofanew,deadlydisease.SAR
随机试题
设计夹具时其工件定位必须满足完全定位。( )
男性,45岁,上腹隐痛,便潜血阳性,钡餐见胃窦小弯侧粘膜纹理紊乱,胃壁僵直,首先考虑
通货膨胀是指由于货币(这里指纸币)的发行量超过()所需要的货币量而引起的货币贬值和物价上涨的现象。
在下列工资数据项中属于独立项的有()。
固定收益平台交易中,交易价格实行涨跌幅限制,涨跌幅比例为5%。涨跌幅价格计算公式为:涨跌幅价格=前一交易日参考价格×(1±5%)。其中,前一交易日参考价格为该日全部交易的收盘价。( )
法律、行政法规没有另外规定的情况下,有数量限制的行政许可,两个或者两个以上申请人的申请均符合法定条件、标准的,行政机关应当根据()作出准予行政许可的决定。
甲、乙国有企业与另外9家国有企业拟联合组建设立“光中有限责任公司”(以下简称光中公司),公司章程的部分内容为:公司股东会除召开定期会议外,还可以召开临时会议,临时会议须经代表1/2以上表决权的股东,1/2以上的董事或1/2以上的监事提议召开。在申请公司设立
【《至尊法案》】(Actsofsupremacy)东北师范大学2001年世界史真题;上海大学2017年历史学综合真题;天津师范大学2017年世界史真题
DriedFoodsCenturiesago,mandiscoveredthatremovingmoisture(51)foodhelpedtopreserveit,andthattheeasiestwaytodot
NinetypercentofAmericansknowthatmostoftheircompatriotsareoverweight,butjust40percentbelievethemselvestobetoo
最新回复
(
0
)