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, with dark glasses or not, they find themselves suffering fro
Many people believe the glare from snow causes snow blindness. Yet, with dark glasses or not, they find themselves suffering fro
admin
2014-12-31
132
问题
Many people believe the glare from snow causes snow blindness. Yet, with 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 overcomed.
A suitable title for the passage would be______.
选项
A、Snow Blindness and How to Overcome It
B、Nature’ s Cure for Snow Blindness
C、Oldie’sin the Snow
D、Snow Vision
答案
A
解析
主旨题。短文主要讲述了雪盲症和如何避免雪盲症。故文章标题应该是选项A。
转载请注明原文地址:https://kaotiyun.com/show/Lnq7777K
0
大学英语四级
相关试题推荐
Itturnsoutthatagoodnight’srestisgoodforbusiness.One-thirdofAmericanworkersaren’tsleepingenoughtofunction
Itturnsoutthatagoodnight’srestisgoodforbusiness.One-thirdofAmericanworkersaren’tsleepingenoughtofunction
A、Gosailingforachange.B、Seethestorm.C、Playtenniswiththewoman.D、Listentothewarning.C
There’snobetterfeelinginajobthanwhenyouknowthebosshasfullconfidenceinyou.Youenterazonewhereyoucanreally
Google’sGoogleproblemGoogleiskillingGoogleReader.UseofGoogleReader,atool,bytheway,forreadingonlineconten
Theconceptofmanversusmachineisatleastasoldastheindustrialrevolution,butthisphenomenontendstobemostacutely
Ifyouaretryingtodoyourbitforsustainabilityandsavewaterbytakingshortershowers,thenanewreportonsustainabilit
AreportconsistentlybroughtbackbyvisitorstotheUSishowfriendly,courteousandhelpfulmostAmericansweretothem.To
A、Reporterandfashiondesigner.B、Teacherandstudent.C、Shopassistantandcustomer.D、Husbandandwife.A推理判断题。对话双方讨论了服装如何体现人
随机试题
普通万向节一般用于两轴线夹角为15°~20°场合,且需成对使用。()
下列不属于组合逻辑电路的是【】
有用信息最重要的特征是()。
关于HCO3-重吸收的叙述,错误的是
患者女性,17岁,因反抗抢劫,颈部被刀割伤,来院时发现:颈部横切口,可闻呼吸声,呼吸困难,皮下可触及捻发音。对此病人重要的急诊处理是
A.基牙的远、近缺隙侧均有明显的倒凹B.基牙向缺隙方向倾斜时所画出的观测线C.基牙向缺隙相反方向倾斜时所画出的观测线D.基牙向颊侧倾斜时所形成的观测线E.基牙向舌侧倾斜时所形成的观测线二型观测线是()
某中型企业在财产清查中,查明盘盈生产设备一台,同类设备的市场价格为156000元,根据其新旧程度估计其已损耗价值为60000元。则报经审批前企业应作出的会计分录为()。
某宾馆2004nia年10月份发生如下业务:1.收取客房收入100万元。2.代客人预订机票收取手续费2万元3.本月免费为一公司提供一间办公室(每天房价120元),其条件是该公司为宾馆提供一批价值相当的空调。合同期限为一个月(30天)。4.台球室取得
人们常用“碧水丹山”来赞美哪座山?()
成熟学说是强调基因顺序规定着儿童生理和心理发展的理论,其代表人物是美国心理学家和儿科医生()。
最新回复
(
0
)