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
69
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."
【M4】
选项
答案
likes—likens
解析
形近词错误。like一词在本句中解释不通,从该句的后半段可以看出,生物学家Tsien是将大脑中的这种要素比作一个桶装管道或窗户,因此用liken。
转载请注明原文地址:https://www.kaotiyun.com/show/vYdO777K
0
专业英语八级
相关试题推荐
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
Amazon,whichgotitsstartsellingbooksonline,announcedthisyearthat,forthefirsttime,itsdigitalbookshadoutsold
CableTVhasexperiencedtremendousgrowthasanadvertisingmediumbecauseithassomeimportantadvantages.Aprimaryoneis
Fundingpublictransitisoneofthebiggestproblemsfacingcitiestoday.Oftenthetroubleisthatafewhigh-cost,low-rider
Engaginginahobbylikereadingabook,makingapatchworkquiltorevenplayingcomputergamescandelaytheonsetofdementi
Todaywomenearnalmost60percentofallbachelor’sdegreesandmorethanhalfofmaster’sandPh.D.’s.Manypeoplebelieveth
WhichofthefollowingisNOTacompoundword?
Chinesecourtesieshavealwaysbeenformaltofollowstrictrules,althoughsometimesChinesepeopleseemtobeimpoliteaccordi
1ConsidertheseresultsfromastudyreleasedlastweekbytheManhattanInstitute,aNewYork-basedthinktank:Two-thirds
随机试题
酶能加速化学反应速度是由于
0.55g0.25g
根据我国刑事诉讼法的规定和有关的司法解释,下列哪个说法是正确的?
甲与同事丙路过一居民楼时,三楼乙家阳台上的化盆坠落,砸在甲的头上,致其脑震荡,共花费医疗费1万元。甲以乙为被告诉至法院要求赔偿,而乙否认甲受伤系自家花盆坠落所致。对这一争议事实,应由谁承担举证责任?
不属于土石围堰类型的有()。
商业银行的流动性风险评估方法有()
Severalyearsintoacampaigntogetkidstoeatbetterandexercisemore,childobesityrateshaveappearedtostabilize,andm
滴
Formanyyears,wehavebeenledtobelievethataperson’sintellectualintelligenceisthegreatestpredictorofsuccess.Soci
A、Hehasnevertakenpartinadebatethisyear.B、Hebelievestheteamwaseliminatedalready.C、Heistoobusytogototheco
最新回复
(
0
)