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
58
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] 【M10】
选项
答案
so—but
解析
连词使用错误。so之后的从句与它前面的“或许可以”并没有因果关系,而应当是转折关系,即就算该试验可能用于人类也必须首先取得突破性进展以及解决棘手的道德问题。
转载请注明原文地址:https://tihaiku.com/zcyy/3251134.html
相关试题推荐
[originaltext]Woman:Well,itseemsquitecommonactually.LotsofpeopleinAu
[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
随机试题
TheGreatGatsbywaswrittenby______.A、WallaceStevensB、ThomasStearnsEliot
为课程设置提供了明确的方向,是其它三个阶段的基础的是()A.指导阶段
根据《标准施工招标文件》中通用条款的内容,如果承包人在施工过程中发现文物、古迹而
患儿,生后3天。症见全身冰冷,全身肌肤板硬而肿,气息微弱,僵卧少动,哭声低怯,吸
既能解郁安神,又能活血消肿的药是()。A.酸枣仁B.合欢皮C.柏子仁D.远志E
表面活性剂的应用不包括A:乳化剂 B:润湿剂 C:增溶剂 D:催化剂 E
当供求法则发生作用时,粮食减产将引起()。A.粮食价格上升 B.粮食价格下降
关于财产税所具有的特点的说法.正确的有()。A.具有资源配置职能 B.符合税收
水闸闸墩混凝土的抗渗等级为W4,表示混凝土抵抗静水压力的能力为( )。A.0.4
女性,30岁。左腰部受伤后出现腰痛和镜下血尿,生命体征稳定,应考虑A:肾挫伤
最新回复
(
0
)