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
职业资格
Many people believe the glare from snow causes snow-blindness. Yet, dark glasses or not, they find themselves suffering from hea
Many people believe the glare from snow causes snow-blindness. Yet, dark glasses or not, they find themselves suffering from hea
admin
2021-08-09
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 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 barren snow-covered terrain. 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 muscles ache. Nature offsets this irritation by producing more and fluid which covers the eyeball. The fluid covers the eyeball in increasing quantity until vision blurs, then is observed, 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 scouring the snow-blanketed landscape. By focusing their attention on one object at a time, the men can cross the snow without becoming hopelessly snow-blind or lost. In this way the problem of crossing a solid white terrain is overcome.
When the eyes are sore tears are produced to______.
选项
A、clear the vision
B、remedy snow-blindness
C、ease the irritation
D、loosen the muscles
答案
C
解析
根据第二段“the eyeballs become sore…Nature offsets this irritation by producing moreand fluid which covers the eyeball”可知,眼泪的分泌是为了缓和刺激,故选C。
转载请注明原文地址:https://jikaoti.com/ti/npD9FFFM
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
教学设计中最先考虑的问题是()。
人民教育出版社普通高中课程标准实验教科书《思想政治必修4──生活与哲学》第八课第二框《用发展的观点看问题》一共包括以下两个小标题:(1)前途是光明的,道路是曲折的;(2)做好量变的准备,促进事物的质变。请对这一框的教学内容进行简要分析,并进行教学设计
下面是高中必修教材《生活与哲学》中“整体和部分的辩证关系”课文相关内容,根据内容,设计教学目标,并提出有效达成该目标的三条措施。(1)整体和部分的区别整体是事物的全局和发展的全过程,从数量看它是一;部分是事物的局部和发展的各个阶段,从数量上看它是多。
教学片段:在上《孝敬父母》一课之前,教师预先布置了“我为爸爸(或妈妈)洗一次脚”的活动,并写出自己的感受。(第二天,同学们纷纷上台交流。)生1.“我闻到了妈妈的脚臭,但是我不觉得臭,因为她都是为了我。”生2.“我才知道,妈妈以前为我洗脚、洗澡的时候
WhichofthefollowingcanNOTbeusedasapre-readingtask?
Socialchangeismorelikelytooccurinsocietieswherethereisamixtureofdifferentkindsofpeoplethaninsocietieswhere
Thestudyoflanguagedevelopmentoveraperiodoftimeisgenerallycalled______linguistics.
InanEnglishclass,theteacher,firstly,playstheradioandasksstudentstolistentothetapeandunderstandthedialogue.
—Youknowwhat?I’vegotaNewYearconcertticket.—Oh,________You’rekidding.
随机试题
血管闭塞性脉管炎局部缺血期患肢表现为()
设a=(一1,1,2),b={3,0,4),则Prjba=().
所谓的燕麦细胞癌是下列何种癌症的典型细胞
巴戟天玄参
A、党参B、山药C、黄芪D、西洋参E、白术苦凉清泄,为凉补之品的是
某商铺的购买价格为100万元,其中60万元来自银行贷款。该贷款在10年内按年等额偿还,年利率为7%,预计该商铺第1年税后净现金流量为3万元,如果不考虑物业增值收益,则第1年的投资回报率为()。[2009年考题]
依据《危险化学品安全管理条例》的规定,危险化学品(公路)运输企业的(),必须掌握危险化学品运输的安全知识,并经所在地设区的市级人民政府交通部门考核合格,取得上岗资格证,方可上岗作业。
我方出口商品共100箱,每箱的体积为30cm×60cm×50cm,毛重为40千克,查运费表得知该货为9级,计费标准为W/M,基本运费为每运费吨109港元,另收燃油附加费20%,港口拥挤费20%,货币贬值附加费10%。试计算:该批货物的运费是多少港元?
鲁迅批判中国人的劣根性,批判中国人的面子心理、看客心态、马虎作风。但他的批评是建立在自省和自剖基础上的,不是________,而是带有一种悲悯和________的。填入画横线部分最恰当的一项是:
Evenbeforetheopeningceremony,arecordhadbeenbrokenatSochi;12newevents,themostforanyOlympics,werescheduledto
最新回复
(
0
)