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
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, but this is lar
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, but this is lar
admin
2018-10-16
31
问题
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, but this is largely because, unlike animals, we stand upright This means that our noses are【C1】______to perceiving those smells which float through the air, missing the majority of smells which stick to surfaces. In fact, though, we are【C2】______sensitive to smells, even if we do not generally realize it Our noses are capable of【C3】______human smells even when these are diluted to far below one part in one million.
Strangely, some people find that they can smell one type of flower but not another, whereas others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate【C4】______smell receptors in the nose. These receptors are the cells which sense smells and send【C5】______to the brain. However, it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when【C6】______to it often enough.
The explanation for insensitivity to smell seems to be that the brain finds it【C7】______to keep all smell receptors working all the time but can create new receptors if necessary. This may also explain why we are not usually sensitive to our own smells—we【C8】______do not need to be. We are not【C9】______of the usual smell of our own house, but we notice new smells when we visit someone else’s. The brain finds it best to keep smell receptors available for unfamiliar and【C10】______signals such as the smell of smoke, which might indicate the danger of fire.
A)simply E)permanently I)dedicated M)distinguishing
B)emergency F)limited J)exposed N)particular
C)aware G)sure K)impulses O)extremely
D)detecting H)inefficient L)messages
【C4】
选项
答案
N
解析
这里缺少修饰smell receptors的词,可以是形容词、名词或分词。空格所在句是对该段第一句提出的奇特现象作出解释,原因在于缺少某种基因,所以不能在鼻子中产生某些气味的感受器。particular意为“特定的”,代入句中指“特定气味的感受器”。
转载请注明原文地址:https://kaotiyun.com/show/2AH7777K
0
大学英语六级
相关试题推荐
Inthe1920sAmericaenjoyedwhatwastobecomeknownas"anAgeofExcess".From1921-1929manufacturingoutputincreasedwith
LatinoyouthsneedbettereducationforArizonatotakefulladvantageofthepossibilitiesthen-explodingpopulationoffers.Ar
"Theworld’senvironmentissurprisinglyhealthy.Discuss."Ifthatwereanexaminationtopic,moststudentswouldtearitapart
NewDiscoveriesofPublicTransportA)AnewstudyconductedfortheWorldBankbyMurdochUniversity’sInstituteforScienceand
A、2.7milliondollars.B、6.7milliondollars.C、About7milliondollars.D、About8milliondollars.C本题考查数字。短文中提到同年,麦当劳公司赚得大约700
A、Bycollectingdonationsfromitsbelievers.B、Bypromotingitsonlinereligionservices.C、Byrentingoutitschurchforbigc
A、Sheknowsalotaboutactivevolcanoes.B、Sheworksasanassistantfortheprofessor.C、Sheseemsnotveryfamiliarwiththe
A、Theyareverydangeroustothenearbycommunity.B、Theycanbringrarematerialstothesurface.C、Theyproducemoreheattot
A、Itpaidoff.B、Itturnedouttobeanightmare.C、Itwasovercharged.D、Itmadeheranexpert.A短文在谈论Ashley的海外经验时提到,她的海外学习经验让她
A、TakeSusantocourt.B、ForfeitSusan’smoney.C、GiveSusan’sdepositback.D、ChargeSusanextramoney.B
随机试题
控制舌运动的脑神经是
男,73岁。间断左下腹疼痛半年,有时粪便中带有鲜血,肛门下坠感。体重下降5kg。查体:T36.8℃,P80次/分,R18次/分。BP140/80mmHg,贫血貌,左下腹有压痛。实验室检查:血红蛋白85g/L,粪便隐血试验(+)。最可能的诊断是
选择人工牙后牙殆面解剖形态主要考虑
人参反
选聘、解聘物业服务企业是()的职责。[2010年考试真题]
按照《2000年国际贸易术语解释通则》的规定,下列国际贸易术语中仅适用水上运输方式的是()。
银行是经营货币信用业务的特殊企业,其通过吸收储蓄存款等形式,将分散在个人手中的闲置货币集中起来,用于向工商企业发放贷款的职能属于()职能。
“前年杀吴禄贞,去年杀张振武,今年又杀宋教仁;你说是应桂馨,他说是洪述祖,我说确是袁世凯。”这副挽联中提及的事件最终引发了()。
从以下备选答案中为程序(1)~(4)处空缺选择正确答案,并填入对应的解答栏内。(1)~(4)备选答案:(1)A.openB.runC.executeD.Dim(2)A.openB.r
Thousandsofpeopleturnedoutintothestreetsto_______againstthelocalauthorities’decisiontobuildahighwayacrossthef
最新回复
(
0
)