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
2024-04-23
33
管理
问题
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, but this is largely because, unlike animals, we stand upright This means that our noses are【C1】______to perceiving those smells which float through the air, missing the majority of smells which stick to surfaces. In fact, though, we are【C2】______sensitive to smells, even if we do not generally realize it. Our noses are capable of【C3】______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【C4】______smell receptors in the nose. These receptors are the cells which sense smells and send【C5】______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【C6】______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 create new receptors if necessary. This may also explain why we are not usually sensitive to our own smells—we【C8】______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.
A)simply B)emergency C)aware D)detecting
E)permanently F)limited G)sure H)inefficient
I)dedicated J)exposed K)impulses L)messages
M)distinguishing N)particular O)extremely [br] 【C9】
选项
答案
C
解析
空格介于系动词are和介词of之间,推测为固定搭配。能符合此搭配的词有aware和sure。be aware of意为“意识到”,带人句中表示“我们意识不到我们自己的房子通常的气味”,句意通顺。而sure代人句中则表示“对自己房间的熟悉气味没有把握”,不符合逻辑。
转载请注明原文地址:https://tihaiku.com/zcyy/3567847.html
相关试题推荐
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
[originaltext]Themostimportantmessagethathumansdelivertooneanother
[originaltext]Themostimportantmessagethathumansdelivertooneanother
[originaltext]W:Howwillyouspendyoursummervacation?M:AtfirstIthought
[originaltext]W:Howwillyouspendyoursummervacation?M:AtfirstIthought
[originaltext]W:Howwillyouspendyoursummervacation?M:AtfirstIthought
[originaltext]W:IthoughtAlexsaidhegotAsinallhistests.M:Laura,you
[originaltext]W:IthoughtAlexsaidhegotAsinallhistests.M:Laura,you
随机试题
Howmuchphysicalactivityshouldteenagersdo,
A—telephoneoperatorB—extensiontelephoneC—directd
FoodandYourLifeStagesThenutritionalneed
[originaltext]Americacontinuestoleadtheworldasadestinationforinte
OnMarchI,areader’sletterpublishedinLianheZaobao’sForumpagewiththeh
浪漫主义和现实主义是19世纪以来世界文学艺术的重要表现手法。世纪50年代,著名话
以下关于拒绝服务攻击的叙述中,不正确的是()。A.拒绝服务攻击的目的是使计算
不会成为膀胱癌致癌危险因素的是A.膀胱白斑 B.吸烟 C.长期慢性膀胱炎症
(2018年真题)商业票据的特点包括()。A.期限长 B.方式灵活 C
成人每日必要氮损失(ONL),折合成蛋白质约为A.5g B.10g C.15
最新回复
(
0
)