首页
登录
职称英语
Many people dream of having a smarter brain. Princeton neurobiologist Josep
Many people dream of having a smarter brain. Princeton neurobiologist Josep
游客
2023-12-07
80
管理
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." [br] 【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://tihaiku.com/zcyy/3251131.html
相关试题推荐
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
Ensuringanadequatewatersupplyhavebeenaconcerneversincepeoplebeganto
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
PositiveforYouthaimstoplaceteenagersandyoungpeopleatitsheart.Th
随机试题
Althoughmostpeoplereturnfrompackageholidaysreasonablysatisfied,this
WhathappenedonJanuary27th,1967?[br][originaltext]Althoughitisimp
Iwish____________________(你没有患这么严重的头痛,因为我敢肯定(如果不是头疼的话)你会在这场比赛中有很好的表现).thaty
Tobesuccessfulinajobinterview,oneshoulddemonstratecertainpersonal
Heinsistedthatshe__________improvehe
对于下面所示的图G,如果回路I,II,III是按单连支回路法选出的一组基
假设系统中有事务T1和T2,数据D1和D2。若T1对D1已加排它锁,对D2已加共
根据下表回答问题: 2004年我国部分省、市大中型工业企业专利申请及拥有量统
影响药物吸收的生理因素()A.血脑屏障 B.首关效应 C.肾小球过滤 D.
(2018年真题)20×7年2月1日,甲公司与乙公司签订了一项总额为20000
最新回复
(
0
)