首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Study Says Dogs Can Smell Cancer Dogs are known for their sense of smell. They can find missing people and things like bombs
Study Says Dogs Can Smell Cancer Dogs are known for their sense of smell. They can find missing people and things like bombs
admin
2015-08-08
69
问题
Study Says Dogs Can Smell Cancer
Dogs are known for their sense of smell. They can find missing people and things like bombs and illegal drugs. Now a study suggests that the animal known as man’s best friend can even find bladder(膀胱)cancer.
Cancer cells are thought to produce chemicals with unusual odors(气味). Researchers think dogs have the ability to smell these odors,even in very small amounts,in urine(尿). The sense of smell in dogs is thousands of times better than in humans.
The study follows reports of cases where, for example, a dog showed great interest in a growth on the leg of its owner. The mole(痣)was later found to be skin cancer.
Carolyn Willis led a team of researchers at Amersham Hospital in England. They trained different kinds of dogs for the experiment. The study involved urine collected from bladder cancer patients, from people with other diseases and from healthy people.
Each dog was tested eight times. In each test there were seven samples for the dogs to smell. The dog was supposed to signal the one from a bladder cancer patient by lying down next to it.
Two cocker spaniels(短腿长毛垂耳小猎犬)were correct fifty-six percent of the time. But the scientists reported an average success rate of forty-one percent.
As a group, the study found that the dogs chose the correct sample twenty-two out of fifty-four times. That is almost three times more often than would be expected by chance alone.
The British Medical Journal published the research. In all, thirty-six bladder cancer patients and one hundred and eight other people took part.
During training,all the dogs reportedly even identified a cancer in a person who had tested healthy before the study. Doctors found a growth on the person’s right kidney(肾).
Bladder cancer is the ninth most common cancer worldwide. The International Agency for Research on Cancer says this disease kills more than one hundred thousand people each year. Doctors say cigarette smoking is the leading cause of bladder cancer.
The dog’s average success rate was______.
选项
A、26%
B、22%
C、41%
D、56%
答案
C
解析
第六段第二句说,科学家报告,平均成功率为41%。
转载请注明原文地址:https://kaotiyun.com/show/ICmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingpassageandchoosethebestwordforeachspace.Moneyspentonadvertisingismoneyspentaswellasany
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Youwillhearfiveconversationstakingplaceinrestaurantsandthecustomersarecomplainingaboutsomething.Beforeyoul
Lookatthetenstatementsforthispart.YouwillhearashortinterviewwithGeorgeJones,executivedirectorforBreadfo
Beforehisretirement,Brianworkedasapilotforacompanycalled(9)______foralongtime.Brianfeelslikeabirdwhenfl
Beforehisretirement,Brianworkedasapilotforacompanycalled(9)______foralongtime.Brianfeelslikeabirdwhenfl
THEPAINTING0InthevillagewhereIgrewup,everyoneknewanoldman00whospentallofhistimewithpainting.Peoplewho
THETRAINJOURNEY0YouknowIwasgoingdowntoLondontostaywithmyfriend00Aliceduringtheholidays.Well,thetr
Whatisthewritertryingtodeinthetext?CustomerschooseMrBirdbecausehisshoes
ManyofnovelistCarsonMcCullers’charactersareisolated,disappointedpeople.
随机试题
检验认识真理性的唯一标准是()
遗嘱可以分为________、________、________、________和________。遗嘱人可以撤销、变更所立遗嘱。立有数份遗嘱,内容相抵触的,以最后的遗嘱为准。自书、代书、录音、口头遗嘱,不得撤销、变更公征遗嘱。遗嘱继承或者遗赠附有义务的
肾上腺素结合受体活化G蛋白后将产生的作用是
胰高血糖素主要通过下列哪一条信息通路调节靶细胞功能
投掷时要求力作用于器械的路程要长,该路程主要指_______到_______的距离。
请选择最适合的一项填入问号处,使右边图形的变化规律与左边图形一致。
(13年)设平面区域D由直线χ=3y,y=3y及χ+y=8围成,计χ2dχdy.
设A是3阶矩阵,ξ1,ξ2,ξ3是三个线性无关的3维列向量,满足Aξi=ξi,i=1,2,3,则A=________.
Whataretheroadsnottakenbecausestudentsmusttakeoutloansforcollege?Foronething,itappearsthatpeoplewithstuden
Whenwearrivedatthestation,itwassaidthatthetrainwouldbelatefortenminutes,sowe______.
最新回复
(
0
)