首页
登录
职称英语
Many people believe the glare from snow causes snow blindness. Yet, dark gla
Many people believe the glare from snow causes snow blindness. Yet, dark gla
游客
2025-04-12
21
管理
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 snowblindness, 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, snowblindness.
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 snowblind or lost. In this way the problem of crossing a solid white area is overcome. [br] A suitable title for this passage would be_____.
选项
A、Snowblindness and How to Overcome It
B、Nature’ s Cure for Snowblindness
C、Soldiers in the Snow
D、Snow Vision
答案
A
解析
雪盲及如何避免雪盲是文章的主题,A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/4034515.html
相关试题推荐
Hewas______inthestreetsoftheMexicancapitalbymorethanamillionpeople,
(北京大学2006年试题)LastyearFrenchdriverskilled【1】than5,000peopleontheroa
(北京大学2006年试题)LastyearFrenchdriverskilled【1】than5,000peopleontheroa
(北京大学2006年试题)LastyearFrenchdriverskilled【1】than5,000peopleontheroa
(北京大学2006年试题)LastyearFrenchdriverskilled【1】than5,000peopleontheroa
(北京大学2006年试题)LastyearFrenchdriverskilled【1】than5,000peopleontheroa
Whoeverhasskillsandknowledgeinthiscountry,Ibelieve,shouldbeproperly
Somepeoplefindthatcertainfoods______theirheadaches.(复旦大学2011年试题)A、introduc
PeopleplanningtotravelbycartoNorthDakotainthewinterareadvisedto___
Whenmostpeoplethinkaboutchangingtheirbodyshape,theyusuallyfocuso
随机试题
Commercialbankdeposits,includingdemanddeposits,aresubjecttoimmediat
IonceaskedadvertisinglegendCarlAllywhatmakesthecreativepersontic
【B1】[br]【B11】[originaltext]TheUniversityLibraryisoneofthelargestacade
[originaltext]Asthehumanpopulationhasgrownandbecomewealthier,thed
2009年度全国旅行社营业收入为1806.53亿元,同比增长8.64%;毛利润总
能体现建设项目的实际投资的是()。A:竣工决算 B:设计概算 C:投资估算
某单位两座办公楼之间有一条长204米的道路,在道路起点的两侧和终点的两侧已栽种了
消防设施检测机构在某单位自动喷水灭火系统未安装完毕的情况下出具了合格的《建筑消防
有关出现结核病变态反应,下列哪项是错误的? A.常发生于原发结核感染的病人B.
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)