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
36
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/WLTC777K
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
Cantreestalk?Yes—butnotinwords.Scientistshavereasonstobelievethattreesdocommunicatewitheachother.Notlonga
______(Polite)costsnothingandgainseverything.
OnthemorningofNovember18,1755,anearthquakeshookBoston,Massachusetts.JohnWinthrop,aprofessoratHarvardCollege,【3
Therichlifethewealthymanhadlongbeenusedto______greatlysoonafterthebigfailureofhisbusinessin2008.
Anystudentwho______hishomeworkisunlikelytopasstheexamination.
(2009)Inexperiencedasheis,hehassucceeded______otherexperiencedresearchersfail.
Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolIhavetaughtinhasever【B1
A、periodB、materialC、expectD、experienceC
Inanycomprehensiontextyouwillfindwordsthatyoudon’tknow,Youcan【C1】______themupinadictionary,ofcourse,【C2】_____
Thewebsitescanbeusedto______booksthathavelongbeenoutofprint.
随机试题
根据《建设工程质量管理条例》,施工单位必须对建筑材料、建筑构配件、设备和商品混凝土进行检验,检验应当有书面记录和专人签字;未经检验或者检验不合格的,不得使用。其检验的依据有()。
中国特色社会主义事业的依靠力量是工人、农民、知识分子。()
Thedrunkmanwasrunningfromsidetosideinthecrowdandheknockedinto______.
患者,女,55岁。因左下牙疼痛2个月,下唇麻木3周就诊。检查见,左下唇较对侧感觉迟钝,右下第三磨牙松动Ⅱ度,无龋坏。X线片见根尖区骨松质之内,呈不规则虫蚀状破坏。根据以上临床表现,最可能的诊断是
患者,男性,35岁。因外伤导致尿失禁,现遵医嘱为该患者进行留置导尿。为避免泌尿系感染和尿盐沉积阻塞尿管,病情许可下,患者每日应摄取足够液体使尿量维持在
水泵设备在安装时应认真核定设备的()。
纳税人分立时未缴清税款的,分立后的纳税人对未履行的纳税义务应当承担连带责任。()
AllSumeriancitiesrecognizedanumberofgodsincommon,includingtheskygod,thelordofstorms,andthemorningandevenin
Whatwillthewomando?
Thedog_____uscoming.He______tomeetus.
最新回复
(
0
)