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
113
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
Healthyadultstakeapproximately10-14breathsperminute,butsomepeoplebreathe20ormoretimes—thiscanleadtofeeling
Englishisoneoftheworld’smostwidelyspokenlanguages.ThisispartlybecauseitwasthelanguageoftheBritishEmpire.T
IhavebeenteachingforlongerthanIcaretosay,andalwaysofferacourseforenteringfreshmen.AndI’vediscoveredsomet
CableTVhasexperiencedtremendousgrowthasanadvertisingmediumbecauseithassomeimportantadvantages.Aprimaryoneis
Fundingpublictransitisoneofthebiggestproblemsfacingcitiestoday.Oftenthetroubleisthatafewhigh-cost,low-rider
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,theywerepromisedawealthofprospectsunless【M1】____
______isgenerallyregardedasthebeginningofmodemworldhistory.
Woe!Woetothepoliticianwhoisperceivedtobefailingtodosomethingaboutthesoaringpriceofgasoline,whichhasjumped
ComputerCrimeⅠ.IntroductionCurrentsituation:theincreaseinnumberandtypeofcomputercrimeⅡ.Featuresofc
Formattingforresults.a)theuseofunderlines,italics,bold,andallcapsb)【1】iskeytomaketheinformationontheresume
随机试题
凯恩斯把人们持有货币的三个动机分为()。
延迟AGC是指输入信号不大时AGC起作用,当输入信号电平超过某一值时AGC就不起作用。
在我国对外经贸关系中,双方经济实力不分强弱,规模不分大小,在谈判中应处于平等地位,是贯彻()
A.FⅢB.FⅦC.FⅧD.FⅫ内源性凝血途径的始动因子是
2004年3月,某县邮政局发生以下经济业务:传递函件、包件取得收入3万元,报刊发行收入9万元,邮务物品销售和其他邮政业务收入8万元;发生工资等支出6万元。已知邮政局适用的营业税税率为3%。该邮政局3月份应缴纳的营业税税额为( )万元。
针对不同需求的员工,应如何选择激励方式?
阅读下面的课例评析(节选),按要求答题。关于《记粱任公先生的一次演讲》的教学,我还想补充几则资料供参考,一是余光中的《听听那冷雨》,二是梁启超的《饮冰室文集》,深刻体会梁先生“印象最深”“至今不能忘记”等语句。这几则资料对理解文本或许有所帮助。对上述课例评
下列选项中,表述正确的是()。
Nowadaysteenagersarenot______tostandandappreciateworksofart;theyprefertoparticipateinthem.
A、Theylosttheirway.B、Theyforgotwhattheyweredoing.C、Theyweresleepy.D、Theyhadmentalmistakes.B该题问“根据本段,为什么人们在疲倦时易于
最新回复
(
0
)