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
50
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."
【M9】
选项
答案
with—against
解析
搭配错误。to pit somethingagainst是一个固定搭配,意思是使前后两者进行竞争。
转载请注明原文地址:https://kaotiyun.com/show/gYdO777K
0
专业英语八级
相关试题推荐
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
Poetrydoesn’tmattertomostpeople.Onehastowonderifpoetryhasanyplaceinthe21stcentury,whenmusicvideosandsat
Languageisfantasticallycomplex.Itsbuilt-inmeansofcombiningandrecombining(nesting)ofitsvariouslevelshave【M1】______
ForadevelopingcountrylikeIndiawhoseecologicalandsocio-economicsystemsarealreadyunderpressurefromrapidurbaniza
Fundingpublictransitisoneofthebiggestproblemsfacingcitiestoday.Oftenthetroubleisthatafewhigh-cost,low-rider
Engaginginahobbylikereadingabook,makingapatchworkquiltorevenplayingcomputergamescandelaytheonsetofdementi
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,theywerepromisedawealthofprospectsunless【M1】____
It’stheholidayseasonandthatmeanskidsbythemillionsareaskingSantafortheopportunitytoblowawayenemysoldiersan
Intheword"books,bags,boxes",thepluralmorpheme{-s}isrealizedby/s/,/z/,/iz/inphoneticpointofview,thuswecancall
Formattingforresults.a)theuseofunderlines,italics,bold,andallcapsb)【1】iskeytomaketheinformationontheresume
随机试题
实行半总统制的国家主要有()
A、liberationB、relationC、questionD、attentionC
A.大量弹性膜B.大量环形平滑肌C.大量纵行平滑肌D.管径小于0.3mmE.管径0.3~1mm大静脉外膜
男,56岁。上腹不适,进食后饱胀2个月,时有恶心、呕吐,上腹部隐痛,无烧心、反酸,查体:T36.5℃,P80次/分,R18次/分,BP120/80mmHg。身高170cm,体重52kg,心肺查体未见异常,上腹部深压痛,无肌紧张、反跳痛。胃镜在胃体小
A.普鲁卡因胺B.苯妥英钠C.利多卡因D.维拉帕米E.胺碘酮急性心肌梗死引起的室性心律失常首选药
环磷酰胺属于哪一类抗肿瘤药物()。
2007年新颁布的评估准则包括()等。
“环境保护是我国的一项基本国策”是在全国第()次环境保护会议上确定的。
现代西方哲学存在科学主义和人本主义两大思潮,马克思主义哲学对它们的态度是()
传说帝尧时“十日并出”,尧使东夷人首领()射日,为民除害。
最新回复
(
0
)