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
49
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."
【M7】
选项
答案
specifically—specially
解析
近义词使用错误。前者的意思是特殊地、特定地,而后者则指专门地,与本句意思相符。
转载请注明原文地址:https://jikaoti.com/ti/opsYFFFM
0
专业英语八级
相关试题推荐
Healthyadultstakeapproximately10-14breathsperminute,butsomepeoplebreathe20ormoretimes—thiscanleadtofeeling
Englishisoneoftheworld’smostwidelyspokenlanguages.ThisispartlybecauseitwasthelanguageoftheBritishEmpire.T
Fundingpublictransitisoneofthebiggestproblemsfacingcitiestoday.Oftenthetroubleisthatafewhigh-cost,low-rider
Engaginginahobbylikereadingabook,makingapatchworkquiltorevenplayingcomputergamescandelaytheonsetofdementi
WhichofthefollowingisNOTmentionedasafactortomakeretailsalesrise?
WhichofthefollowingisNOTapoliticaldivisionontheislandofGreatBritain?
Syntacticmovementisdictatedbyrulestraditionallycalled
ComputerCrimeI.IntroductionCurrentsituation;theincreaseinnumberandtypeofcomputercrimeII.Featuresofcomputer
ComputerCrimeⅠ.IntroductionCurrentsituation:theincreaseinnumberandtypeofcomputercrimeⅡ.Featuresofc
Formattingforresults.a)theuseofunderlines,italics,bold,andallcapsb)【1】iskeytomaketheinformationontheresume
随机试题
细胞因子不包括()
A.维生素CB.维生素DC.内因子D.钠离子能促进铁的吸收的是
肝硬化失代偿期最突出的表现是
患者,女,30岁,已婚。月经周期正常,但经量多(5包纸/次),色深红、质稠,心烦口渴,尿黄便结,舌红苔黄,脉滑数。妇科盆腔及B超检查无异常,基础体温呈双相。治疗应首选
A.卵黄囊B.胆囊C.淋巴管D.肝脾E.骨髓胚胎第5月时主要造血器官是
为了控制客户资产管理风险,《证券公司客户资产管理业务试行办法》要求()。
全国人民代表大会常务委员会制定《中华人民共和国反垄断法》,是行使市场规制立法权的行为。()
太阳公司是G省的一家于2013年挂牌上市的公司,其主营业务是从事水泥及水泥制品的生产和销售。 2018年5月,某财经媒体深度报道了太阳公司存在的多种经营违规行为。该报道在微博等网络平台上成为热门话题后,G省证监局迅速反应,立案调查。 根据证监局的调查结
分数合成的方法包括()
Theannouncementthatthey_________________(成功地研制出)anewkindofboilingsteelgreatlyexcitedus.
最新回复
(
0
)