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
外语
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【31】this is larg
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【31】this is larg
admin
2012-01-05
16
问题
The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals,【31】this is largely because,【32】animals, we stand upright. This means that our noses are【33】to perceiving those smells which float through the air,【34】the majority of smells which stick to surfaces. In fact,【35】, we are extremely sensitive to smells,【36】we do not generally realize it. Our noses are capable of【37】human smells even when these are【38】to far below one part in one million.
Strangely, some people find that they can smell one type of flower but not another,【39】others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate【40】smell receptors in the nose. These receptors are the cells which sense smells and send【41】to the brain. However, it has been found that even people insensitive to a certain smell【42】can suddenly become sensitive to it when【43】to it often enough.
The explanation for insensitivity to smell seems to be that the brain finds it【44】to keep all smell receptors working all the time but can【45】new receptors if necessary. This may【46】explain why we are not usually sensitive to our own smells—we simply do not need to be. We are not【47】of the usual smell of our own house, but we【48】new smells when we visit someone else’s. The brain finds it best to keep smell receptors【49】for unfamiliar and emergency signals【50】the smell of smoke, which might indicate the danger of fire.
选项
A、still
B、also
C、otherwise
D、nevertheless
答案
B
解析
上文中提到explanation,此处空格后又出现explain,这显然是一种并列或递进关系,只有also符合题意,其他三个选项均表示转折关系。
转载请注明原文地址:https://kaotiyun.com/show/OK1K777K
0
专业英语四级
相关试题推荐
Youshouldknowbetterthan______theriskofgambling.
Whatisthetalkmainlyabout?
Howmanychaptersdidthespeakerfinishreading?
Theteacherswhispered______theyshoulddisturbthestudents.
Theperformanceofaparticularprojectisusuallyanalyzed______customersneeds.
AccordingtotheresearchbyNASA,anafternoonnap______.
Fortheexecutiveproducerofanetworknightlynewsprogram,theworkdayoftenbeginsatmidnight—asminedidduringsevenyea
That______thecase,wehavetomakesomechangesinourplan.
Weallhaveoffensivebreathatonetimeoranother.Inmostcasesoffensivebreathemanatesfrombacteriainthemouth,althoug
Hespokeso_____thatevenhisopponentswerewonoverbyhisarguments.
随机试题
简述著作权的内容。
患者,女,54岁。6年来面目及肌肤淡黄,晦暗不泽,肢软乏力,心悸气短,大便溏薄,舌淡苔薄,脉濡细。治疗此病证首选的方剂是
仪表单体调试的目的是( )。
根据《水电建设工程质量管理暂行办法》(电水农[1997]220号),下列属于设计单位职责的是()。
钻(挖)孔灌注摩擦桩单桩轴向受压容许承载力[P]的计算公式[P]=1/2(UlτP+AσR)中,l是()。
技术合同是( )就技术开发,转让、咨询或者服务订立的确立相互之间权利和义务的合同。
2022年3月,中央宣传部、全国妇联向全社会宣传发布了2022年()先进事迹。布茹玛汗·毛勒朵、李桓英、尹建敏、关欣、胡海岚、卢宇彤、路生梅、杨宁、甘公荣、吴蓉瑾10位全国三八红旗手标兵光荣入选。
试析淝水之战前后南北政局的特点及其变化。(中国人民大学2005年中国通史真题)
自主创新
Medicalstudentsareplanningaweek-longdemonstration______oftherecentincreaseintuitionfees.
最新回复
(
0
)