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
考研
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【C1】______this i
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【C1】______this i
admin
2012-08-24
21
问题
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【C1】______this is largely because, 【C2】______animals, we stand upright. This means that our noses are【C3】______to perceiving those smells which float through the air, 【C4】______the majority of smells which stick to surfaces. In fact, 【C5】______, we are extremely sensitive to smells, 【C6】______we do not generally realize it. Our noses are capable of 【C7】______human smells even when these are【C8】______to far below one part in one million.
Strangely, some people find that they can smell one type of flower but not another, 【C9】______others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate【C10】______smell receptors in the nose. These receptors are the cells which sense smells and send messages to the brain. However, it has been found that even people insensitive to a certain smell【C11】______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【C12】______to keep all smell receptors working all the time but can create new receptors if necessary. This may 【C13】______explain why we are not usually sensitive to our own smells—we simply do not need to be. We are not【C14】______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【C15】______for unfamiliar and emergency signals such as the smell of smoke, which might indicate the danger of fire.
【C10】
选项
A、unusual
B、particular
C、unique
D、typical
答案
B
解析
句意“这意味着有些人的鼻子里缺少某种基因,这种基因是激发人鼻子里的……气味感知器所必需的。”选项A.unusual不寻常的;B.particular特别的,特定的;C.unique独一无二的;D.typical典型的。这种“气味感知器”具有感知气味这种特定的功能。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/Dbhi777K
0
在职申硕(同等学力)英语
相关试题推荐
AEachculturehasitsowndistinctiveBwaysofseeing,feeling,thinking,speaking,believing,andCjustlikenotwohumansare
Thewriterappliedforthejobbecause______Thewriterthoughthewasoverqualifiedforthejobbecause
Comparedwiththeircosmologist(宇宙学家)colleagues,cosmogonists(星源学家)cansoundalittleold-fashioned.EdgarAllenPoeturnedto
Comparedwiththeircosmologist(宇宙学家)colleagues,cosmogonists(星源学家)cansoundalittleold-fashioned.EdgarAllenPoeturnedto
Comparedwiththeircosmologist(宇宙学家)colleagues,cosmogonists(星源学家)cansoundalittleold-fashioned.EdgarAllenPoeturnedto
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Hewasexhilaratedbythethoughtofhis______trip.
随机试题
价值比率有很多种,但在评估实务中,最常用的有()。
女婴,11个月,多汗,烦躁,睡眠不安,可见肋膈沟,下肢轻度“0”型腿,血清钙稍低,血磷降低,碱性磷酸酶增高,其佝偻病应处于
不得抵押的房屋有()。
在事件风险量的区域划分中,风险事件一旦发生,会造成重大损失,但发生的概率却极小的区域是()。
企业收购、兼并竞争者的同类型的企业,或者在国内与其他同类企业合资生产经营属于()。
态度的认知成分是指个体对态度对象所具有的带有评价意义的()。
3D:电影
A.attheminimumcostB.reinforcedbythefactoryC.crowedtogetherD.asself-reliantfarmersPhrases:A.wheretoolargem
在VisualFoxPro中,如果在表之间的联系中设置了参照完整性规则,并在删除规则中选择了“限制”,当删除父表记录时,系统反应是( )。
Ididnot______tomeetyouherefarawayinthiscountry.
最新回复
(
0
)