首页
登录
职称英语
The human nose is an underrated tool. Humans are often thought to be insensi
The human nose is an underrated tool. Humans are often thought to be insensi
游客
2023-11-16
40
管理
问题
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【31】this is largely because,【32】animals, we stand upright. This means that our noses are【33】to perceiving those smells which float through the air,【34】the majority of smells which stick to surfaces. In fact,【35】, we are extremely sensitive to smells,【36】we do not generally realize it. Our noses are capable of【37】human smells even when these are【38】to far below one part in one million.
Strangely, some people find that they can smell one type of flower but not another,【39】others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate【40】smell receptors in the nose. These receptors are the cells which sense smells and send【41】to the brain. However, it has been found that even people insensitive to a certain smell【42】can suddenly become sensitive to it when【43】to it often enough.
The explanation for insensitivity to smell seems to be that the brain finds it【44】to keep all smell receptors working all the time but can【45】new receptors if necessary. This may【46】explain why we are not usually sensitive to our own smells—we simply do not need to be. We are not【47】of the usual smell of our own house, but we【48】new smells when we visit someone else’s. The brain finds it best to keep smell receptors【49】for unfamiliar and emergency signals【50】the smell of smoke, which might indicate the danger of fire. [br]
选项
A、diluted
B、dissolved
C、dispersed
D、diffused
答案
A
解析
原句的意思为“即使人类的气味被……到百万分之一以下,我们的鼻子也能捕捉到这些气味”。根据空格前的判断关键词human smells由此可以判断dilute(冲淡、稀释)符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3192963.html
相关试题推荐
Accordingtothenarrator,whichkindofdogsisthoughttohaveasenseofhumo
Accordingtothenarrator,whichkindofdogsisthoughttohaveasenseofhumo
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesand
随机试题
保护好京杭大运河,对于传承人类文明、促进社会和谐发展具有极其重大的意义。TheprotectionoftheBeijing-HangzhouGrand
[originaltext]Gettingtheirchildrenintocollegeusedtobethegoalofmillio
SubfieldsofLinguisticsTheoverlappinginterestsb
A.导管癌 B.腺泡细胞癌 C.腺样囊性癌 D.上皮肌上皮癌 E.黏液表
下列关于单期资产收益的表达式中,正确的有( )。A、单期资产的收益率=资产价值的
室性早搏常见的病因是A.电解质紊乱 B.精神因素 C.各种心脏病 D
按照分散系统分类,不属于真溶液的是A:芳香水剂B:溶液剂C:甘油剂D:露剂
下列权益和财产中,可用房地产开发项目资本金出资的有()。A.股票 B.期
下列资金成本中,可用来比较各种融资方式优劣的是( )。A.综合资金成本 B.
变压器的额定容量SN=320kVA,额定运行时空载损耗P。=21kW,如果电源电
最新回复
(
0
)