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
28
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.
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、Soldiers in 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Snow Blindness and How toOvercome It.故选A.
转载请注明原文地址:https://kaotiyun.com/show/eev7777K
0
大学英语四级
相关试题推荐
HealthworkerswhoareHIVpositivearebannedfromperformingmostsurgeryordentaltreatmentincasetheycutthemselveswith
HealthworkerswhoareHIVpositivearebannedfromperformingmostsurgeryordentaltreatmentincasetheycutthemselveswith
HealthworkerswhoareHIVpositivearebannedfromperformingmostsurgeryordentaltreatmentincasetheycutthemselveswith
HealthworkerswhoareHIVpositivearebannedfromperformingmostsurgeryordentaltreatmentincasetheycutthemselveswith
A、Peoplemovetogether.B、Itisgettinghardertotravelinwinter.C、Therearemorewaysoftravelling.D、Itislessdangerous
A、Thefamilyandtheschool.B、Theadultsandthemassmedia.C、Thesocietyandtheyoungpeople.D、Theparentsandthekids.C事
A、Hiresomeonetofixthewashingmachine.B、Usethewashingmachinesinthegym.C、Notifythemaintenancepeopletofixthemac
HappinessandSadnessHappinessandsadnessaretwomostbasicandfamiliarfeelingsforhumanbeings.Recently,peoplehave
HappinessandSadnessHappinessandsadnessaretwomostbasicandfamiliarfeelingsforhumanbeings.Recently,peoplehave
随机试题
在时间分辨荧光免疫测定中常用的荧光标记物是
H1受体阻断药最适用于()。
计算可供分配的利润时,无关的项目是( )。
deficitspending
结合材料回答问题:材料11942年1月,日军进攻缅甸,英军节节败退,英国政府正式向中国政府请求迅速派兵入缅协同英军作战。中国政府即派出10万远征军入缅,后又不断增兵。由于中国战场和印、滇、缅战场牵制日军达130万之众,使日军无法调往太平
在状态栏中显示出行号。
阅读下列说明,回答问题。【说明】针对电子商务软件开发建设项目,建设单位甲与承建单位乙签订了项目实施合同,与监理单位丙签订了项目监理合同。在项目实施过程中发生了如下事件。【事件1】合同生效后,承建单位项目经理在短时间内即完成了项目计划的编制并提交监理
Allthecountriesalliedtofightagainsttheir________.
Parentsareoftenupsetwhentheirchildrenpraisethehomesoftheirfriends.Theymayeven【T1】______themofdisloyalty,ormak
Together,theUnitedStatesandBrazilproducemorethan70%oftheworld’salcohol.IntheUnitedStates,alcoholisproducedm
最新回复
(
0
)