首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
财务会计
It’s one of our common beliefs that mice
It’s one of our common beliefs that mice
天天题库
2019-12-17
19
问题
It’s one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is hard-wired into a mouse’ s brain.But now Wendy Ingram, a graduate student at the University of California, Berkeley, has challenged this common sense. She has found a way to “cure” mice of their inborn fear of cats by infecting them with a parasite, reported the science journal Nature.The parasite, called Toxoplasma gondii, might sound unfamiliar to you, but the shocking fact is that up to one-third of people around the world are infected by it. This parasite can cause different diseases among humans, especially pregnant women—it is linked to blindness and the death of unborn babies.However, the parasite’s effects on mice are unique. Ingram and her team measured how mice reacted to a cat's urine (尿) before and after it was infected by the parasite. They noted that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area.But that's not all. The parasite was found to be more powerful than originally thought—even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell, which could indicate that the infection has caused a permanent change in mice's brains.Why does a parasite change a mouse's brain instead of making it sick like it does to humans The answer lies in evolution.“It’s exciting scary to know how a parasite can manipulate a mouse's brain this way,"Ingram said. But she also finds it inspiring. "Typically if you have a bacterial infection, you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away,” she said, but this study has proven that wrong. “This may have huge implications for infectious disease medicine."The underlined part“hard-wired”in Paragraph 1 probably means__________.查看材料
选项
A.deeply rootedB.quickly changedC.closely linkedD.deeply hurried
答案
A
解析
文章第一段指出老鼠即使没有见过猫也是会害怕的,可推断出这是天生就刻在老鼠脑子里的一种行为。deeplv rooted“根深蒂固的”符合文章想要表达的意思,故选A。
转载请注明原文地址:https://ti.zuoweng.com/ti/MYzlKKKQ
相关试题推荐
It’soneofourcommonbeliefsthatmice
It’soneofourcommonbeliefsthatmice
It’soneofourcommonbeliefsthatmice
It’soneofourcommonbeliefsthatmice
It’soneofourcommonbeliefsthatmice
随机试题
4、A公司2014年6月招聘张某为公司的库房管理员,但一直未与张某签订劳动合同,
下列关于备兑看涨期权策略的表述,错误的是()。?
下列选项中,应按照交通运输业征收增值税的有()。
下列情形中,可以对有关责任人员采取终身的证券市场禁入措施的有()。 Ⅰ.严重
仿制药应当与被仿制药具有同样的
梦游症的特点有A、醒来后能够回忆B、醒来后完全不能回忆C、发作次数固定D、主要原因是睡觉前精神愉快E、每天都会发作
患者,女,57岁,3个月前于洗澡时发现左侧乳房有一小指头大小的无痛性肿块,近1个月来肿块逐渐增大,且皮肤呈橘皮样变化,其原因主要是A.癌细胞侵犯乳房Cooper
大嘴鲈鱼只在有鲦鱼出现的河中长有浮藻的水域里生活。漠亚河中没有大嘴鲈鱼。 从上述断定能得出以下哪项结论( ) (1)鲦鱼只在长有浮藻的河中才能发现。...
有配伍禁忌的药组是A.健脾丸与良附丸B.天麻丸与大活络丸C.尪痹颗粒与川贝枇杷露D.牛黄解毒丸与柏子养心丸E.妇血康颗粒与益母草颗粒
下列金融机构中,由中国银行保险监管委员会负责监管的有()。A.财务公司B.期货公司C.信托投资公司D.金融租赁公司E.金融资产管理公司