• 2021-04-14 问题

    What is the mission of the Girl Scouts of the United States of America ?

    What is the mission of the Girl Scouts of the United States of America ?

  • 2022-05-29 问题

    Which one is the largest group in all of the divisions of the scouts?

    Which one is the largest group in all of the divisions of the scouts?

  • 2022-06-04 问题

    To help pay for their activities, Scouts mainly raise money

    To help pay for their activities, Scouts mainly raise money

  • 2022-06-08 问题

    At the head of the valley, the scouts turned left and headed _____the summit. A: to B: for C: on D: into

    At the head of the valley, the scouts turned left and headed _____the summit. A: to B: for C: on D: into

  • 2022-06-01 问题

    He ______ to become a successful simultaneous interpreter Someday. A: aspires B: scouts C: penalizes D: modernizes

    He ______ to become a successful simultaneous interpreter Someday. A: aspires B: scouts C: penalizes D: modernizes

  • 2022-06-06 问题

    ______ may play a variety of guitar family instruments. A: Cruisers B: Scouts C: Screwdrivers D: Guitarists

    ______ may play a variety of guitar family instruments. A: Cruisers B: Scouts C: Screwdrivers D: Guitarists

  • 2022-05-29 问题

    How did King Henry find out about the plot A: His scouts discovered it. B: He saw the conspirators coming. C: One of the conspirators told him. D: He found a copy of the conspirators' plan.

    How did King Henry find out about the plot A: His scouts discovered it. B: He saw the conspirators coming. C: One of the conspirators told him. D: He found a copy of the conspirators' plan.

  • 2022-05-29 问题

    How did King Herry find out about the plot A: His scouts discovered it. B: He saw the conspirators coming. C: One of the conspirators told him. D: He found a copy of the conspirators' plan.

    How did King Herry find out about the plot A: His scouts discovered it. B: He saw the conspirators coming. C: One of the conspirators told him. D: He found a copy of the conspirators' plan.

  • 2021-04-14 问题

    Many people believe that the glare from snow causes snowblindness. 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 glare from snow does not cause snowblindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of barren snow-covered terrain. 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 muscles ache. Nature offsets this irritation by producing more and more fluid which covers the eyeballs. The fluid covers the eyeball in increasing quantity until vision blurs, then is obscured, and the result is total, even though temporary, snowblindness. Experiments led to 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 scouring the snow-blanketed landscape. By focusing their attention on one object at a time, the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white terrain is overcome.

    Many people believe that the glare from snow causes snowblindness. 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 glare from snow does not cause snowblindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad expanse of barren snow-covered terrain. 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 muscles ache. Nature offsets this irritation by producing more and more fluid which covers the eyeballs. The fluid covers the eyeball in increasing quantity until vision blurs, then is obscured, and the result is total, even though temporary, snowblindness. Experiments led to 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 scouring the snow-blanketed landscape. By focusing their attention on one object at a time, the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a solid white terrain is overcome.

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