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
125
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、distinguishing
B、discovering
C、determining
D、detecting
答案
D
解析
此处空格用来描述在某种条件下,我们的鼻子能对气味做出怎样的反应。因此D项detecting(发现,察觉出)符合题意。
转载请注明原文地址:https://kaotiyun.com/show/B71K777K
0
专业英语四级
相关试题推荐
Whatdidthemandoduringthewintervocation?
Youshouldbeawareofhis______questionwheninterviewedtomorrow.
Theelectronicgameswouldnothave______withoutbeingingeniouslyprogrammed.
WhichoneofthefollowingisNOTtrueaccordingtotheaccident?
Areyouthinkingabouttryingoutapoliticalcareerbutyour【C1】______arealittlelowforapresidentialbid?Youhaveuntil
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
Humansareuniqueintheextenttowhichtheycanreflectonthemselvesandothers.Humansareableto【C1】______,tothinkin
Itis______yourwhiletakingouttravelinsurancebeforeyoutravel.
Thecrisishas【C1】______questionsaboutthelargeoilcompaniesandwindfallprofits.Criticsoftheoilindustry【C2】______
Hedecidedtomakefurtherimprovementsonthecomputer’sdesign______thelightoftherequirementsofcustomers.
随机试题
电子商务系统可能遭受哪些攻击?
A.昏迷的病人B.脑中风一侧肢体瘫痪C.糖尿病酮症酸中毒D.腹部手术后第3天的病人E.胃溃疡康复准备出院的病人以上最适合运用辅助一教育系统的是
建设项目总投资中的土地使用费包括在()中。
2014年,经发包人甲公司同意,总承包人乙公司将自己承包的部分工程分包给丙公司,后来因为丙公司完成的工程质量有问题,给甲.公司造成1000万元的损失,根据合同法律制度的规定,下列关于对甲公司损失承担责任的表述中,正确的是()。
一个功能完善、运行顺利的金融系统通过风险的分散和分担与提供不同风险等级的资产,可以把总体的金融风险贴水减少到()。
做一套衣服,上衣用布2.4米,裤子用布是上衣的2/5,做这套制服大约用布多少米?()
阅读下列材料,回答问题。××区文化局办公会议同意辖区文化馆《关于固定资产报废的请示》,但因管理权限,需报区财政局审批;同时,议定向区财政局申请“赛龙舟、庆端午”活动经费。局办公室的小吴拟写了给区财政局的公文,正文初稿如下:“我区文化馆于
国民革命失败的原因是
Theterm"businessmodel"firstcameintowidespreadusewiththeinventionofthepersonalcomputerandthespreadsheet(空白表格程序)
TheaimoftheconferenceisallofthefollowingEXCEPT______.
最新回复
(
0
)