首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
The earth is much cooler than the sun, and the wave length of the earth’ s radiations is much longer than that of sunrays. These
The earth is much cooler than the sun, and the wave length of the earth’ s radiations is much longer than that of sunrays. These
admin
2015-07-21
22
问题
The earth is much cooler than the sun, and the wave length of the earth’ s radiations is much longer than that of sunrays. These longer heat waves cannot pass through the atmosphere as easily as the short waves coming from the sun. Similarly, radio stations that transmit programs to distant countries broadcast in short waves, which can travel all around the world. Stations that broadcast local programs send out longer waves, which can be received more easily, but only in a limited area.
Heat waves, rising from the earth, meet resistance in the atmosphere from the water vapor there. Many if the waves are stopped by the water vapor can not get back out into space. The atmosphere, when it is warmed up, also adds some heat back to the earth’ s surface.
When the sun’ s rays strike water surface, some of the water becomes absorbed by the air as water vapor. The warmer the air is, the more vapor it can hold. When the air has absorbed its maximum amount of vapor, it is said to be saturated. If the air is then cooled, some of the vapor will condense and clouds will form. These clouds will contain drops of water at temperatures above freezing, or ice crystals at temperatures below freezing.
Clouds can greatly affect the temperature of the earth’ s surface. When there are many clouds in the sky, all of the sun’ s rays can not reach the earth. The cloudy day, then, will be cooler than the cloudless day. Clouds also prevent the earth from cooling off rapidly at night. For this reason, countries such as the British Isles, which are often covered by clouds, have a relatively constant temperature. The weather in these cloudy areas is neither very hot in summer nor very cold in winter. On the other hand, places such as deserts, which have few or no clouds, have very sharp variations in temperature—between night and day as well as between summer and winter.
Radio stations that transmit programs to distant countries send out waves that resemble______.
选项
A、heat waves rising from the earth
B、waves absorbed by water vapor
C、waves sent out by radio stations that transmit local programs
D、the rays sent out from the sun
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/oQTC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
The______(discover)ofgoldontheirlandmadethepeoplerapidlyrich.
McDonald’sistheworldsinglebiggestfoodproviderwithannualsalesofaround$12.4bn.Andthecompany’ssymbolRonaldMcDona
Itgoes______sayingthatitisnotaneasythingtolearnaforeignlanguage.
ThanksgivingDayisalwayscelebratedonthefourthThursdayofNovember.ItisthemosttraditionalofAmericanholidays.Thef
AnEnglish-Englishdictionaryisa______(must)forEnglishlearners.
Shehappenedtowitnessanaccident______inthestreetlastnight.
Dreamisastorythataperson"watches"oreventakespartinduringsleep.Dreameventsareimaginary,buttheyarerelatedt
(2006)Recentlythenewspapershavereportedseveral_____ontheboundariesofIsraelandJordan.
InBritainpeopledrive______theleft.
Heaskedusto()themincarryingthroughtheirplan.
随机试题
63.患者,女,37岁,因小腹胀痛2月余、加重5天就诊。主诉就诊前无明显诱因出现小腹胀痛,阴道不规则流液,流出物呈黄色脓状,量时多时少,下腹及腰骶部间歇性坠痛。间断性院外治疗(口服金刚藤胶囊、阿莫西林胶囊,具体用量不详)。5天前月经来潮,下腹部坠痛与腰骶部
物权是权利主体依法享有直接支配其特定物,并享受其利益的排他性权利。最完整、最充分的物权种类是
“字字写来都是血,十年辛苦不寻常”和“文不甚深,言不甚俗”分别讲的是中国古典文学中的()
软产道
A.早产儿B.足月儿C.过期儿D.低出生体重儿E.巨大儿
确诊伤寒的依据是()
目前的企业债券发行核准程序分为先核定规模(额度)、后核准发行两个环节。( )
下列结论正确的是()。
Theword"attenuating"(Paragraph1)mostprobablymeansWhichofthefollowingistrueaccordingtothetext?
A、Itdoesnotmakeanycontributiontotheworldpeace.B、Itshouldnotexistanylonger.C、Itisthebestorganizationtowardp
最新回复
(
0
)