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
2017-12-07
58
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 0) extremely
D) detecting H) inefficient L) messages
【C10】
选项
答案
B
解析
这里填入的词与unfamiliar共同修饰signals,可以是名词,也可以是形容词或分词。从such as后面的例子来看,smell of smoke是火险的信号,可判断这是紧急情况,故选emergency。
转载请注明原文地址:https://kaotiyun.com/show/T4U7777K
0
大学英语六级
相关试题推荐
Naturally,inagroupofanimalsasdiverseasthesnakes,andwithsomanyvariedenemies,therearenumerousdefensivereactio
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Movingfarmorequicklythanmanyhadthoughtlikelyorpossible,lawmakersinthe10-memberHouse-Senatecommitteeannouncedth
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
随机试题
机动车行驶证灭失、丢失,机动车所有人要向登记地车辆管理所申请补领、换领。
领导绩效本质上是实现公共利益、达成组织目标的程度,它是领导者和被领导者共同努力的结果。这是指领导绩效的
关于乳腺摄影,错误的是
梅女士,29岁,未婚,无明显症状,但自己摸到下腹一肿块来妇科就诊。根据病人的主诉和妇科检查,初步印象为子宫肌瘤。张医生建议进一步做实验室检查的项目应该是
过电流上下级熔断体的额定电流比为()具有选择性熔断。
下列中国名茶中属于绿茶的是()。
下列关于宪法的阐述,正确的是()。
企业与企业之间通过互联网进行产品、服务及信息交换的电子商务模式是()
用综合业务数字网(又称一线通)接入因特网的优点是上网通话两不误,它的英文缩写是
Themaniscarryingaboxfullofbigapples.Themancancarrythebox.
最新回复
(
0
)