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
73
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
•Readthetextbelowaboutsupermarketcheckouts.•Inmostofthelines41—52th
A.acrossB.shortC.actualD.tentativelyE.alteredF.quickG.corre
WeexpectMr.Drewwill______ClassTwowhenMissSymeretires.A、takeoverB、ta
在OSI/RM中,网络层传输的是()。A.比特流 B.数据帧 C.数据
关于沟通表达方式的描述,不正确的是()。A.文字沟通的优点是:读者可以根据
水泥混凝土的计量应按监理人认可的并已完工工程的净尺寸计算,面积不超过()的填角部
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
()为买卖双方约定于未来某一特定时间以约定价格买入或卖出一定数量的商品。A.分
下列预算中,在编制时需要以生产预算为基础的有()。A.变动制造费用预算 B.固
投标报价时,综合单价的确定过程中确定计算基础的内容主要包括()。A.分析每一清
最新回复
(
0
)