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
A. limited B. distinguish C. unlike D. particular E. trigger F. inefficient G. create H. emergency
A. limited B. distinguish C. unlike D. particular E. trigger F. inefficient G. create H. emergency
admin
2017-10-17
28
问题
A. limited B. distinguish C. unlike D. particular E. trigger
F. inefficient G. create H. emergency I. incompetent J. detecting
K. aware L. messages M. unusual N. surfaces O. confined
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, but this is largely because, 【C1】______ animals, we stand upright. This means that our noses are 【C2】______ to perceiving those smells which float through the air, missing the majority of smells which stick to 【C3】______. In fact, though, we are extremely sensitive to smells, even if we do not generally realize it. Our noses are capable of 【C4】______ 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 【C5】______ smell receptors in the nose. These receptors are the cells which sense smells and send 【C6】______ 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 exposed 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 【C8】______ new receptors if necessary. This may also explain why we are not usually sensitive to our own smells-we simply 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.
【C3】
选项
答案
N
解析
空格前的stick to表明,此处填入名词。本句说明的是人类的鼻子能够感受到的和不能闻到的气味,由此可推断此处填入的词要与前面的float through the air相反。surface“表面”符合语义。
转载请注明原文地址:https://kaotiyun.com/show/WjDK777K
0
专业英语四级
相关试题推荐
WhatisthecharacteristicoflearnersofspecialEnglish?
WhichofthefollowingdetailsisINCORRECT?
WhichofthefollowingisINCORRECTaboutthewoman?
Father’sDayFather’sDayisneverquitesuchthebigcommercialeventthatMother’sDayis,/probablybecauseithasn’tbe
PressingOilfromSeeds【T1】______byusingpressure.Amachine【T2】______isoftenused.Thefirststepinpressingtheoil
A、Byfillinginsomeonlineformsaboutlocalcrashhistory.B、Byidentifyingsomeblackspotsofthelocalcommittees.C、Byrec
A、Theyreducedthestaff.B、Theyreducedsalary.C、Theyrecombineddepartments.D、Theychangedseniormanagement.A本题考查细节。由句(4)可
InitsfirstmonthorbitingSaturn,theCassinispacecrafthasdetectedanewradiationbeltinanunexpectedplace,itsinvisib
Thecommunicationsexplosionisonthescaleoftherail,automobileortelephonerevolution.Verysoonyou’llbeabletorecord
_____wehavenotmadeanyarrangementforourpicnic.
随机试题
临终患者感知觉改变的表现有
诊断鸡新城疫的血清学试验检疫最常用的方法是
不完全竞争是市场失灵的一种形式,政府干预不完全竞争的方法有()。
下列关于非公开募集基金财产的证券投资的说法中,错误的是()。
()是旅行社进行产品设计、生产和销售活动的先决条件。
长江三峡西起重庆奉节白帝城,东止于()的南津关。
政治体制改革是社会主义政治制度的自我完善和发展,必须坚持正确的政治方向,必须坚持中国特色社会主义政治发展道路,绝不照搬西方政治制度模式。在推进我国政治体制改革的总体要求中,其目标是()
[*]
程序流程图中指有箭头的线段表示的是
Careeristsarepeoplewhoseself-imageisdeterminedalmostexclusivelybytheirjobs.【B1】______everythingtheydoisdesignedt
最新回复
(
0
)