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
36
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
【C5】
选项
答案
L
解析
空格所在句是which引导的定语从句,填入的词作send的宾语。messages指“信息”,这里指感受器把信息传给大脑,符合句子逻辑。impulses多表示人的冲动或兴奋,用在此处不合适。
转载请注明原文地址:https://kaotiyun.com/show/J4U7777K
0
大学英语六级
相关试题推荐
Naturally,inagroupofanimalsasdiverseasthesnakes,andwithsomanyvariedenemies,therearenumerousdefensivereactio
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Movingfarmorequicklythanmanyhadthoughtlikelyorpossible,lawmakersinthe10-memberHouse-Senatecommitteeannouncedth
Movingfarmorequicklythanmanyhadthoughtlikelyorpossible,lawmakersinthe10-memberHouse-Senatecommitteeannouncedth
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
随机试题
阅读钱锺书《说笑》中的文字:笑是最流动、最迅速的表情,从眼睛里泛到口角边。东方朔《神异经·东荒经》载东王公投壶不中,“天为之笑”,张华注谓天笑即是闪电,真是绝顶聪明的想象。据荷兰夫人的《追忆录》,薛德尼·斯密史也曾说:“电光是天的诙谐。
Criticismandself-criticismisnecessary______ithelpsustofindandcorrectourmistakes.
对于造影检查错误的是
两样本方差齐时,完全随机设计的两样本均数比较,应选择的统计方法是检验两样本所在总体的方差是否相等时,应选择的统计方法是
谵妄时最多见的幻觉是
A.肝细胞点灶状坏死B.肝细胞碎片状坏死C.肝细胞亚大片坏死D.肝细胞桥接坏死E.肝细胞大片坏死急性重型肝炎的病理特点是()。
会计专业技术人员参加继续教育取得的学分,每年累计不得少于70学分。()
下列情形适用假释的是()。
厂商的生产函数为f(x,y,z)=min{x3/y,y2,(z4一x4)/y2}那么,对于该厂商而言,它具有怎样的规模报酬特征?()
下列关于合同成立的表述,正确的是()。
最新回复
(
0
)