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
2023-08-17
53
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 E)permanently I)dedicated M)distinguishing
B)emergency F)limited J)exposed N)particular
C)aware G)sure K)impulses O)extremely
D)detecting H)inefficient L)messages [br] 【C7】
选项
答案
H
解析
这里是“主语+find+it+a.+不定式”的句式,故空格应填入形容词。that从句解释了“对气味不敏感”的原因。词库中只有inefficient符合句意,表明“对气味不敏感的原因是:大脑发现让所有的气味感受器一直处于运转状态效率太低”。
转载请注明原文地址:https://tihaiku.com/zcyy/2933845.html
相关试题推荐
[originaltext]Inthenot-sodistantpast,mostpeoplethoughtthatwhenaw
[originaltext]Inthenot-sodistantpast,mostpeoplethoughtthatwhenaw
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Theselfishnessofhumansisacentralassumptionoforthodox(传统的)economics,
Theselfishnessofhumansisacentralassumptionoforthodox(传统的)economics,
Theselfishnessofhumansisacentralassumptionoforthodox(传统的)economics,
Theselfishnessofhumansisacentralassumptionoforthodox(传统的)economics,
Theselfishnessofhumansisacentralassumptionoforthodox(传统的)economics,
[originaltext]W:Goodmorning,class.TodayIthoughtwewouldtalkaboutsomet
随机试题
Atatimewhenitwasunusualtodoit,DorothySterlingwroteaboutsuchmajor
设f1(x),f2(x)是二阶线性齐次方程y″+p(x)y′+q(x)y=0的两
与锤造支托相比较,铸造支托突出的优点是()A.恢复咬合关系和良好的牙
金融犯罪的主体是()。A.只能是自然人 B.金融企业 C.可以是自然
某客户3月15日通过电话委托购买了一只开放式基金,委托金额为20000元,该只基
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
期货公司的期货从业人员不得有下列()行为。A:收付、存取或者划转期货保证金
流动动物园巡回展出用羊
农业生产托管情况统计中,农业生产托管服务面积核算中“耕”环节面积的权重是(
2010年全国财政收入为83080亿元,其中中央财政收入为42470亿元,当年全
最新回复
(
0
)