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
41
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] 【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://tihaiku.com/zcyy/3251133.html
相关试题推荐
BlackpeoplewerefirstbroughttoAmericafromAfricaas______.A、workersinfac
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
Ensuringanadequatewatersupplyhavebeenaconcerneversincepeoplebeganto
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
Healthyadultstakeapproximately10-14breathsperminute,butsomepeople
PositiveforYouthaimstoplaceteenagersandyoungpeopleatitsheart.Th
PositiveforYouthaimstoplaceteenagersandyoungpeopleatitsheart.Th
随机试题
ThenationalanthemofAustraliasince1984hasbeen______.A、WaltzingMatildaB、
京杭大运河(theBeijing-HangzhouGrandCanal)开凿于春秋时期(theSpringandAutumnPeriod)
Forthispart,youareallowed30minutestowriteashortessayonthetopicHo
移动电气设备时,必须经()切断电源并做妥善处理后进行。A.电工 B.机械员
办毕公文的处置包括()。A.立卷归档 B.分装 C.清退 D.销毁 E.
用户的身份认证是许多应用系统的第一道防线,身份识别对确保系统和数据的安全保密极及
细菌性肝脓肿与阿米巴性肝脓肿的鉴别?
对追求高投资回报的投资者来说,比较适合的基金类型是( )。A.收入型基金 B
健康促进的基本内涵为( )。A.改变人们的个人行为 B.侧重于政府行为 C
(2016年真题)对建筑高度低于100m的居民建筑,靠外墙的防烟楼梯间及其前室、
最新回复
(
0
)