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
30
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
PeoplewhospendalotoftimesurfingtheInternetaremorelikelytoshowsignsofdepression,BritishscientistssaidonWedn
Inthe1920sAmericaenjoyedwhatwastobecomeknownas"anAgeofExcess".From1921-1929manufacturingoutputincreasedwith
Naturally,inagroupofanimalsasdiverseasthesnakes,andwithsomanyvariedenemies,therearenumerousdefensivereactio
"Theworld’senvironmentissurprisinglyhealthy.Discuss."Ifthatwereanexaminationtopic,moststudentswouldtearitapart
A、Shesawthequeen.B、ShevisitedtheBuckinghamPalace.C、ShemetBenedictCumberbatch.D、Shesawmanyfinesceneries.C细节题。对话
Althoughinteriordesignhasexistedsincethebeginningofarchitecture,itsdevelopmentintoa【C1】______fieldisreallyquite
Baby-NamingTrendsA)Overthelastfiftyyears,Americanparentshaveradicallyincreasedthevarietyofnamestheygivetheirc
Nursing,asatypicallyfemaleprofession,mustdealconstantlywiththefalseimpressionthatnursesaretheretowaitonthep
Westerndoctorsarebeginningtounderstandwhattraditionalhealershavealwaysknown,thatthebodyandthemindareinseparab
Picasso’sartwasnotjustapleasantdistraction.Theartistbelievedthatarthelpstopenetratefurtherintotheworldandin
随机试题
初孕妇,妊娠31周,双下肢水肿20天,既往无特殊病史。查体:BP18/12kPa(140/90mmHg),上腹不适、头痛。尿蛋白定量1g/24h。诊断是
A、0.5~1.5gB、6~10gC、1~3gD、1~1.5gE、0.1~0.5g朱砂内服入丸散的用量是
根据《金融类企业国有资产产权登记管理暂行办法》的规定,金融类企业发生的下列情形中,须申办产权变动登记的有()。
英国房屋的类型决定了物业管理的类型。一般来讲,物业管理服务内容和标准通过物业服务合同约定,管理费用也大多采用()。
《三峡》是八年级上册第六单元的一篇课文,如果让你给八年级的学生执教这篇课文(用时一课时),你会怎么做呢?请按要求完成后面的题目:附:《三峡》课文三峡
已知函数f(x)=Asin(wx+φ)(x∈R,其中A>0,w>0,0<φ<π/2)的图像与x轴的交点中,相邻两个交点之间的距离为π/2,且图像上一个最低点为M(2π/3,-2).当x∈[π/12,π/2]时,求f(x)的值域.
某公司的40名员工分别订阅了甲、乙、丙3种报纸中的1种、2种或3种,请问,至少有多少名员工订阅的报纸种类相同?()
-56,25,-2,7,4,()
下列关于五行思想的说法,不正确的是()。
Arecentparliamentaryreportblamesthegovernmentandthefoodindustryforthegrowthinobesity.TheDepartmentofTransport
最新回复
(
0
)