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
48
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."
【M2】
选项
答案
boost up—boost
解析
Boost在作“推动”之意解时,是及物动词,后面不跟up;而boostup可指帮助某人得到更高的地位,与本句不符。
转载请注明原文地址:https://kaotiyun.com/show/lYdO777K
0
专业英语八级
相关试题推荐
Englishisoneoftheworld’smostwidelyspokenlanguages.ThisispartlybecauseitwasthelanguageoftheBritishEmpire.T
Poetrydoesn’tmattertomostpeople.Onehastowonderifpoetryhasanyplaceinthe21stcentury,whenmusicvideosandsat
CableTVhasexperiencedtremendousgrowthasanadvertisingmediumbecauseithassomeimportantadvantages.Aprimaryoneis
Fundingpublictransitisoneofthebiggestproblemsfacingcitiestoday.Oftenthetroubleisthatafewhigh-cost,low-rider
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,theywerepromisedawealthofprospectsunless【M1】____
______isthestudyofspeechsoundsinlanguageoralanguagewithreferencetotheirdistributionandpatterningandtotacit
WhichofthefollowingisNOTapoliticaldivisionontheislandofGreatBritain?
ComputerCrimeⅠ.IntroductionCurrentsituation:theincreaseinnumberandtypeofcomputercrimeⅡ.Featuresofc
Strangeisoursituationhereuponearth.Eachofuscomesforashortvisit,notknowingwhy,yetsometimesseemingtodivinea
Speakingtwolanguagesratherthanjustonehasobviouspracticalbenefitsinanincreasinglyglobalizedworld.Butinrecentye
随机试题
夜间行车前方遇到这种情况时不能盲目让超。(图3.7.3)
男性,72岁。吸烟指数1200,近半年有咳嗽,痰中带血丝,近2个月出现声嘶。查右锁骨上窝触及一肿大淋巴结,质硬,无压痛。则可能为
双氢氯噻嗪引起妥布霉素引起
甲种工作条件是指1年照射的有效量剂量有可能超过
我国血吸虫病的流行地域为
外科治疗胃十二指肠溃疡的适应症不包括()
患有糖尿病的全麻病人出现原因不明的心动过速、出汗、舒张压降低、脉压增宽、低血压、病人意识消失程度与麻醉深度不符,麻醉后病人神志恢复延迟,这时应考虑病人可能发生了()。
木材在切割时会产生大量细小的木屑,工人如果吸人了细小木屑,他们的肺部功能就会遭到损害。一项对500名经常做木材切割的工人的调查结果显示,平均而言,他们的肺活量仅是另一组不切割木材的人的85%,这两组工人是具有可比性的。由题干可推出()。
Americancigarettesalesareexpectedtodecreaseby______bytheendofthedecade.
A、Hefeelsangry.B、Heneedsattention.C、He’stooquiet.D、He’sverynervous.B男士说,Mark的情况是他想被人注意,女士说这是文章中提到的下一种原因,即对于attention
最新回复
(
0
)