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
42
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
Thatweek’stalentincludedaspectaculardanceteamfromArgentina,apopularr
Afishermanandhiswife,wholivedalone,longedforachildoftheirown,
yearsinthe1940’s,cameasclosetobeingacarboncopyofthejazzvirtuosoi
ThemysteryoftheexpansionofseaicearoundAntarctica,atthesametime
____________(Tom说他不是很明白)andaskedmetorepeatwhatIhadsaid.Tomsaidthath
髋关节前脱位复位最常用的方法是:A.Allis法 B.Hippocrate
厥证与中风的鉴别中,主要的区别是()A.患者的年龄 B.发病时有无四肢厥
A.肝性脑病 B.使药物达峰时间延长 C.低血糖昏迷 D.急性心肌梗死病人
下列进口货物税率形式中,适用原产于与我国签订含有关税优惠条款的区域性贸易协定的国
既可用于地上,也可用于地下或水中建筑物的胶凝材料是()。A.硅酸盐水泥
最新回复
(
0
)