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
Many people dream of having a smarter brain. Princeton neurobiologist Joseph Z. Tsien found the key. In September he announced
Many people dream of having a smarter brain. Princeton neurobiologist Joseph Z. Tsien found the key. In September he announced
admin
2015-02-17
59
问题
Many people dream of having a smarter brain. Princeton
neurobiologist Joseph Z. Tsien found the key. In September he
announced that he built a better mouse by altering a gene that 【M1】______
affects learning and memory. A similar process of gene
manipulation might conceivably be used one day to boost up 【M2】______
intelligence in humans.
The secret lies in a feature of brain cells which called the 【M3】______
nomda receptor, which Tsien likes to a cylindrical tube or window 【M4】______
that mediates the flow of information. When the window is open,
chemicals called neurotransmitters flow through easily and
memory is registered or stored. Tsien noticed that the receptor 【M5】______
worked more efficiently when teamed with the gene NR2B, so he
introduced extra NR2B genes into a batch of fertilized mouse eggs.
In a normal mouse, the memory window is open in just 【M6】______
150-thousandths of a second. In Tsien’s specifically engineered 【M7】______
mice, the window opens for 250-thousandths of a second, long
enough to make a remarkable impression in memory retention. 【M8】______
When he pitted his mice with common mice, they won paws down. 【M9】______
Ordinary mice could recognize a Lego block for 12 hours, but
smart mice could remember the block for up to three days. "That’s
a profound enhancement," Tsien says.
Can it be done with humans? Maybe, so genetic engineering 【M10】______
will have to make some extraordinary advances first. And some
thorny ethical issues will have to be resolved. Meanwhile, Tsien
promises to keep his furry little geniuses locked up in a lab, far
from your larder. "Otherwise," he says, "you might need a smart cat
or a smart mousetrap to catch them."
【M6】
选项
答案
in—for
解析
介词使用错误。从上下文来看,这里指的是记忆之窗打开所持续的时间,因此应该用介词for。实际上,接下来的一句话也能给我们以提示。
转载请注明原文地址:https://kaotiyun.com/show/cYdO777K
0
专业英语八级
相关试题推荐
EvenbeforethehumanorganismdevelopedintotheirpresentstageofHomosapiens,thebeginningsofculturewerealreadyeviden
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
Languageisfantasticallycomplex.Itsbuilt-inmeansofcombiningandrecombining(nesting)ofitsvariouslevelshave【M1】______
IhavebeenteachingforlongerthanIcaretosay,andalwaysofferacourseforenteringfreshmen.AndI’vediscoveredsomet
ForadevelopingcountrylikeIndiawhoseecologicalandsocio-economicsystemsarealreadyunderpressurefromrapidurbaniza
Itismoredifficulttowritesimply,directly,andeffectivethantoemployflowerybutvagueexpressionsthatonlyobscureone
Todaywomenearnalmost60percentofallbachelor’sdegreesandmorethanhalfofmaster’sandPh.D.’s.Manypeoplebelieveth
It’stheholidayseasonandthatmeanskidsbythemillionsareaskingSantafortheopportunitytoblowawayenemysoldiersan
______isgenerallyregardedasthebeginningofmodemworldhistory.
1ConsidertheseresultsfromastudyreleasedlastweekbytheManhattanInstitute,aNewYork-basedthinktank:Two-thirds
随机试题
关于滤过函数的选择,错误的是
胎漏、胎动不安的主要病机是()
据《土地复垦条例》,下列哪些损毁土地由土地复垦义务人负责复垦。()
某运输公司为增值税一般纳税人,从事多种经营。2019年6月发生如下业务:(1)在境内提供水路运输业务,取得收入150万元;提供船舶修理业务,取得收入54万元;提供海员培训服务,取得收入50万元;提供集装箱仓储服务,取得收入46万元;提供国内旅游服务,共收
县级以上人民政府将国有资产无偿划人企业,凡指定专门用途并按规定进行管理的,企业可作为不征税收入进行企业所得税处理。其中,该项资产属于非货币性资产的,应按政府确定的接收价值计算不征税收入。()
下列关于古代文化常识说法错误的一项是()。
下列属于风险控制对策的有()。
Youaregoingtoreadatextabouthowtokeepyourjob,followedbyalistofimportantexamples.Choosethebestexamplefrom
Someadvancedeconomies,notablyJapanandGermany,faredbetterthanothersduringthe1970sand1980s.
WhatmeasurehadtheambassadoranticipatedtheSecurityCounciltotaketofulfillthemission?
最新回复
(
0
)