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
22
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
德昂族,又称\"崩龙族\",分为( )三个支系。 A、\"布龙\" B、\"若买\"
80.()视为放弃继承或者放弃接受遗赠。 A.在遗产处理前没有明确表示准备继
关于熟石膏的凝固速度,以下正确的是 A.搅拌时间越长,凝固速度越快 B.搅拌
某地区今年同去年相比,各种商品零售价格指数为105%,这说明该地区( )。
婴幼儿2岁半时胸围小于头围,则要考虑( )。
下列关于内部招聘的陈述正确的是( )。
正中是指A.下颌第一恒磨牙的近中颊尖咬合在上颌第一恒磨牙颊沟的远中B.上颌第一恒磨牙的近中颊尖咬合在下颌第一恒磨牙颊沟的远中C.上颌第一恒磨牙的近中颊尖正对
单位安排职工到会议室听报告,如果每3人坐一条长椅,那么剩下48人没有坐:如果每5人一条长椅,那么刚好空出两条长椅,听报告的职工有多少人?() A.128...
Passage2 Americanstodaydon′tplaceaveryhighvalueonintellect.Ourhe...
下列各组加点字的读音,全都正确的是()。