首页
登录
职称英语
Many people believe the glare from snow causes snow blindness. Yet, with dar
Many people believe the glare from snow causes snow blindness. Yet, with dar
游客
2024-02-06
5
管理
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. [br] 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。短文第二段倒数第三句指出Nature balances this annoyance by producing more and more liquid which covers the 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://tihaiku.com/zcyy/3426331.html
相关试题推荐
[originaltext]M:Soyoureallybelievethatclothescarryakindofmessagefor
[originaltext]M:Soyoureallybelievethatclothescarryakindofmessagefor
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreade
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreade
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreade
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreade
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuc
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuc
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuc
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuc
随机试题
What’stheadvantageofapartnership?[originaltext]M:Barbara,whathaveyoub
______isknowntotheworld,MarkTwainisagreatAmericanwriter.A、AsB、ThatC
OurculturehascausedmostAmericanstoassumenotonlythatourlanguagei
Advertisersuseseveraldifferenttechniquesforsellingproducts.Onecan【S
胃溃疡患者腹痛发生的机制不包括A.对胃酸刺激的痛阈降低 B.局部肌张力增高
古希腊的三大闻名几何尺规作图问题是()。 ①三等分角②立方倍积③正十七逸形④
下列关于10kV带电作业绝缘斗臂车工频耐压试验说法正确的是()。作业斗内斗预防性
学校绩效
青光眼患者应该慎用A.沙丁胺醇 B.沙美特罗 C.孟鲁司特 D.噻托溴铵
胃大部切除术治疗十二指肠溃疡的原因是A、切除溃疡病变 B、预防癌变 C、阻断
最新回复
(
0
)