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
Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from head
Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from head
admin
2014-11-27
22
问题
Many people believe the glare from snow causes snow blindness. Yet, dark glasses or not they find themselves suffering from headaches and watering eyes, and even snow blindness, when exposed to several hours of "snow light".
The United States Army has now determined that the glare from snow does not cause snow blindness in troops in a snow-covered country. Rather, a man’s eyes frequently find nothing to focus on in a broad expanse of a snow-covered area. So his gaze continually shifts and jumps back and forth over the entire landscape in search of something to look at. Finding nothing, hour after hour, the eyes never stop searching and the eyeballs become sore and the eye muscle aches. Nature balances this annoyance by producing more and more liquid which covers the eyeballs. The liquid covers the eyeballs in increasing quantity until vision blurs. And the result is total, even though temporary, snow blindness.
Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark-colored objects ahead on which they too can focus. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching through the snow-blanketed landscape. By focusing their attention on one object at a time, the man can cross the snow without becoming hopelessly snow blind or lost. In this way the problem of crossing a solid white area is overcome.
When the eyes are sore, tears are produced to______.
选项
A、clear the vision
B、remedy snow blindness
C、ease this annoyance
D、loosen the muscles
答案
C
解析
细节题。短文第二段指出Nature balances this annoyance by producing more and more liquid which coversthe eyeballs.由此可知在这种情况下,由于人身体的自然反应,眼睛会分泌液体(眼泪)来缓解这种不舒服。故选项C正确。
转载请注明原文地址:https://kaotiyun.com/show/iev7777K
0
大学英语四级
相关试题推荐
HappinessandSadnessHappinessandsadnessaretwomostbasicandfamiliarfeelingsforhumanbeings.Recently,peoplehave
FrequentbusinesstravelerJoyceGioiaforgotmorethan$20000worthofjewelryinherhotelroominItalylastyear.Luckily
A、Anotesentthroughane-mailwithmanywords.B、Anotedonebyhandwritingwithspecificity.C、Anotethatisbriefandgener
Tourismreallyisabigbusinessthesedays.It’s【B1】______.Itinvolveshotels,transportation,【B2】______,shops,andthousands
Anewstudyshowsthatstudentslearnmuchbetterthroughanactive,iterative(反复的)processthatinvolvesworkingthroughtheirm
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControlClimatechangecaninfluencehowinfectiousdiseasesaffect
A、Itisveryimpressive.B、Itisanamethatbringshergoodluck.C、Itdoesnotexpressherpersonality.D、Itsoundsverybeaut
Itturnsoutthatagoodnight’srestisgoodforbusiness.One-thirdofAmericanworkersaren’tsleepingenoughtofunction
A、Hedoesn’tthinkit’sagoodidea.B、Hethinksashowerwouldbebetter.C、Hebelievesthatlightningstrikescleansurface.D
A、Giveperformances.B、Watchpuppetmaking.C、Seedinosaurmodels.D、Lookatrockcollections.B选项均为以原形动词开头表明,本题可能考查行为动作。短文中提到……
随机试题
黄某在家里将重约10克的甲基苯丙胺卖给陈某,要价2000元。随后黄某离开了房间,陈某还留在房间里,而18岁的侄儿在一旁打游戏,突然黄某侄儿听到房间外面一阵喧嚣,听到有个人说“我们是公安的”。黄某侄儿马上乘机将黄某卖给陈某的毒品扔出窗外,从而致使毒品遗失,请
图6-31中,船底穿孔后,下沉的过程属于()。
级数()。
直接构成工程实体,但比重较小的材料称为()
(),4,18,48,100
当前,我国环境污染源头最主要是()污染。
社会存在属于社会生活的物质方面,是社会实践和物质生活条件的总和,它主要包括()
Wemustseethebossbeforehemakesthefinal(decide)______.
慰问信说明:以John的名义给住院的朋友Tom写一封慰问信。内容:1.听说Tom住进了医院,深感不安;2.开始以为不是很严重,以为他很快就可以回校上课;很想念他;3.希望他早日康复,早日回校;4.不用担
A、Fewofthemcanlivelong.B、Mostofthemliveanormallife.C、Fewofthemgetalongwellwitheachother.D、Mostofthemdif
最新回复
(
0
)