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
50
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.
【C11】
选项
A、at first
B、at all
C、at large
D、at times
答案
A
解析
句意“然而,……对某种特定气味不敏感的人也能突然变得敏感起来。”在本句中,供选的状语修饰整个句子。选项A.at first起初;B.at all根本;C.at large全面地,详细地,无拘无束地;D.at times有时。由于谓语部分的频度状语“突然”体现了时间的交替关系,句子应该表达起初不敏感。故答案为A。
转载请注明原文地址:https://www.kaotiyun.com/show/Jbhi777K
0
在职申硕(同等学力)英语
相关试题推荐
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
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Discoveriesinscienceandtechnologyarethoughtbymanytocomeinblindingflashesorastheresultofdramaticaccidents:Si
Hewasexhilaratedbythethoughtofhis______trip.
随机试题
穿管敷设时,管内导线的总面积(包括绝缘层)不应超过管内截面积的_________%。
以下属于卫生服务需求特点的是
A、甲状腺单纯性囊肿B、甲状腺腺瘤囊变C、与颈前肌粘连,滤泡退化,形成“假囊肿”D、充满胶质的无回声区E、位于甲状腺与舌骨间亚急性甲状腺炎表现为
为防止近效期药品售出后可能发生的过期使用,药品零售企业应当对药品的有效期进行
下列关于环境噪声污染防治的说法中,错误的是()。
人力资源预测的局限性包括()
根据艾森克的人格维度理论,不稳定外倾型表现为好冲动、好斗、易激动等,相当于()气质。
Hewrotealotofnovels,noneof______wastranslatedintoforeignlanguages.
党的十六届六中全会上,我们党提出建设社会主义核心价值体系,其基本内容包括()。
研究显示,相比于农村地区,城市地区居民哮喘、湿疹、过敏性鼻炎和结膜炎等疾病患病率不断攀升。有个假设是乡村生活环境中的某些因素,譬如自小接触到特定细菌能让人免受对某些过敏源的危害,或是城市地区的许多污染物诱发了这些过敏症的发展。对这段文字理解正确的一项是:
最新回复
(
0
)