首页
登录
职称英语
[audioFiles]2013w28/audio_ezfj_015_20137[/audioFiles]
[audioFiles]2013w28/audio_ezfj_015_20137[/audioFiles]
游客
2023-11-12
49
管理
问题
选项
答案
The Color of Snow
Generally, the color of snow appears white. / This is because the light we see from the sun is white. / Most natural materials take in some sunlight. / This gives them their color. / However, when light travels from air to snow, some light is sent back, or reflected. / Snow crystals have many surfaces to reflect sunlight. / Yet the snow does take in a little sunlight. / It is this light that gives snow its white appearance. /
Sometimes, snow may appear to be blue. / The blue light is the product of a long travel path through the snow. / In simple terms, think of snow as a filter. / A filter is designed to reject some substances, / while permitting others to pass through. / In the case of snow, all the light makes it through if the snow is only a centimeter thick. / If it is a meter or more thick, however, blue light often can be seen. /
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3181691.html
相关试题推荐
[audioFiles]audio_ezf_m_0157(20102)[/audioFiles]
[audioFiles]2012q3/audio_ezfm_109_20129[/audioFiles]TheEnglishPro
[audioFiles]2012q3/audio_ezfm_097_20129[/audioFiles]Wed
[audioFiles]audio_ezf_m_0380(20101)[/audioFiles]
[audioFiles]2013q2/audio_ezfm_025_20132[/audioFiles]
CartoonArtist[audioFiles]2013q2/audio_ezfj_005_20133[/audioFiles]
Drama[audioFiles]2013q2/audio_ezfj_004_20133[/audioFiles]
Sleep[audioFiles]2013q2/audio_ezfj_003_20133[/audioFiles]
ChoosingaCollegeinAmerica[audioFiles]2013q2/audio_ezfj_001_20133[/audioFile
CellPhoneDisturbance[audioFiles]2013q2/audio_ezfj_010_20133[/audioFiles]
随机试题
ReadthearticlebelowabouttheUKretailsector.Choosethebestword
Thevitaminsnecessaryforahealthybodyarenormallysuppliedbyagoodmi
Whenyoubuyagallonoforganicmilk,youexpecttogettastymilkfromhap
[originaltext][9]America’sholidayshoppingseasonstartsonBlackFriday,
根据我国《商业银行资本管理办法(试行)》,下列表述正确的是()。A.盈余公积属
(2020年真题)关于投资协议中回售权条款,表述错误的是()。A.回售权的
规范规定,丘陵地区基本等高距为1m的1:2000数字航空摄影测量成图项目,像控
(共用题干)患者男,60岁。因发热,咳嗽,咳痰伴喘息加重3天入院,患者有吸烟史3
我们要大力弘扬的时代精神是当代人民精神风貌的集中体现,是激发社会创造活力的强大力
tRNA分子3"末端的碱基顺序是A.CCA-3"-OH B.AAA-3"-OH
最新回复
(
0
)