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,【31】this is larg
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【31】this is larg
admin
2012-01-05
86
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.
选项
A、tolerate
B、repel
C、neglect
D、notice
答案
D
解析
根据含义可以判断,对usual smell我们一定是没感觉(not aware of),而对new smells我们一定能发觉(notice)。由此解析可知本题应选择D项notice。
转载请注明原文地址:https://kaotiyun.com/show/pK1K777K
0
专业英语四级
相关试题推荐
Sociologistsuse"power"torefertothecapacityofpeopletocontrolorinfluencetheactionsofothers.Sociologistsstudypo
Whatkindofroomdoesthecustomerwanttoreserve?
"Iboughtthiscomputerfor$500lastweek.""It’sonsalethisweekforonly$400.Youshouldhavewaited.""Oh,really?
Atthelaterstageofdevelopment,there______newproblemswhichfirstseemedinsoluble.
NativeAmericansprobablyarrivedfromAsiainsuccessivewavesoverseveralmillennia,crossingaplainhundredsmileswidetha
Theaveragenumberofwomenineachgroupis______.
Recentlymanyschoolshavefacedwhatcouldhecalledthe-crisisofcomprehensionor,insimpleterms,thephenomenonofstuden
Whatkindofroomdoesthecustomerwanttoreserve?
Thecrisishas【C1】______questionsaboutthelargeoilcompaniesandwindfallprofits.Criticsoftheoilindustry【C2】______
Asitwas,theDemocratswouldcontrolthefederalgovernment______becauseofthedivisionamongtheiropponents,
随机试题
在相同工作电压下的电阻元件,电阻值越大的功率越大。()
在进行突触传递时,必需有哪种离,流入突触小体()
5岁患儿,家住沈阳,无外地居留史。8月15日开始发热,精神不振,头痛,呕吐1次,次日排稀便2次,并反复抽搐2次,神志不清。查体:体温40.1℃,神志不清,压眶无反应,脉充实有力,周身皮肤未见瘀点、瘀斑,颈项强直(+),克氏征(+),肢体肌张力增强。血常规:
引起幼儿牙釉质发育不全的是
某男性患者,25岁。上右1牙冠切1/3横断,近中髓角暴露24小时,无松动,口内余牙无异常,咬合关系正常。未检查出骨折,口内黏膜无创口。最需做的辅助检查是()
下列在我国法院提起的诉讼中,属于涉外民商事法律关系,适用国际私法调整的是()
建设工程法律、行政法规、部门规章的效力从高到低依次为( )。
1990年12月19日和1991年7月3日,深圳证券交易所和上海证券交易所先后正式开业。()
读下图,完成下列小题。这种水系多出现在()。
我国社会主义法律体系的统帅是
最新回复
(
0
)