题目内容
（请给出正确答案）
Snow-blindness may be avoided by______.
A．concentration on the solid white area
B．providing the eyes with something to focus on
C．searching for something to look at in snow-covered areas
D．covering the eyeballs with liquid
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Snow-blindness may be avoided by______.A．concentration on the solid white areaB．providing”相关的问题
Snow-blindness may be avoided by_____.
A．concentration on the solid white area
B．providing the eyes with something to focus on
C．searching for something to look at in snow-covered areas
D．covering the eyeballs with liquid
The United States Army has now determined that glare from snow actually does not cause snow-blindness in troops in snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of a wide snow-covered territory. His gaze, in consequence, continually shifts and jumps back and forth over the entire landscape in search of something he can look at. Finding nothing to focus on, hour after hour, the eyes never stop searching, and the eyeballs will become sore and eye muscles will ache. Nature reduces this uncomfortable feeling by producing more and more fluid which covers the eyeball. The fluid covers the eyeball in increasing quantity until vision becomes increasingly unclear. The result may be total, even though temporary, snow-blindness.
Experiments led the Army to a simple method of overcoming this problem. A small group of soldiers will be sent ahead of a main body of troops. They are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even these soldiers themselves throw lightweight, dark colored objects ahead, on which they, too, can focus. The men following them can then see something. Their gaze is arrested. Their eyes focus on a bush and, having found something to see, stop searching the snow-blanketed landscape. By focusing their attention on lone object at a time, the troops can cross the snow-covered wilderness without becoming hopelessly snow-blind or lost. In this way the problem of crossing a solid white territory is overcome.
Dark glasses have proved to be ______ in overcoming headaches, watering eyes and blindness caused by the glare from snow.
A．useless
B．useful
C．available
D．fruitless
Snow-blindness, according to the passage, can be overcome by ______.
A．crossing a solid white territory
B．producing more and more eye fluid
C．continuously searching for something to look at
D．providing something for the eyes to focus on
A．cross completely snow-covered landscape
B．prevent themselves from suffering snow-blindness
C．let the men behind them see something
D．warm themselves in the cold
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.
The eyeballs become sore and the eye muscles ache because______.
A．tears cover the eyeballs
B．the eyes are annoyed by blinding sunlight
C．the eyes are annoyed by blinding snow
D．there is nothing to focus on
A. may very well
B. may well
C. may just as well
D. may just well
A、It may help patients fall asleep
B、It may lead to mental problems
C、It may cause serious harm to ones liver.
D、It may increase the effect of certain drugs
A、They may feel like children.
B、They don’t care others.
C、They may feel independent.
D、They may feel they are socially intelligent.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
