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
49
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
Upuntiltheageof18,Ireadverylittle.I【C1】______myselftowhatwasne
Talkaboutcreative【C1】______mechanismsforbeingalone,Japanappearstobe
化学课堂上,有些同学只喜欢观看教师所做的演示实验,这种兴趣属于()。A.感知兴趣
β半乳糖苷酶的底物是A.邻苯二胺B.四甲基联苯胺C.ABTSD.对硝基苯磷酸酯E
以下影响药物代谢的因素不包括A.给药剂量和剂型 B.酶抑制和诱导 C.湿度、
消化性溃疡病的攻击因子包括()A.吸烟 B.碳酸氢盐分泌 C.严重创伤使得屏
上皮角化不良的定义是A.上皮表层出现较多角化 B.上皮细胞异形性明显 B.上
对公安部门无偿使用铁路、民航等单位的土地,免征城镇土地使用税。()
下列哪一种应急电源,适用于允许中断供电时间为毫秒级的负荷?()A.快速自起动的
依据《中华人民共和国水污染防治法》,排放水污染物超过国家或地方规定的水污染物排放
最新回复
(
0
)