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
21
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
ThisyearisthetwohundredthanniversaryofthebirthofwriterEdgar/UlanPoe.EdgarAllanPoe,whoselifewas【36】andseemin
AjobinterviewBob:Goodmorning,youmustbeTomGreen.I’mBobSmith,thepersonnelmanager.Tom:【D1】______.Bob:Ihaveyou
Forthispart,youareallowed30minutestowriteashortessayentitled"WheretoWork;DevelopedCitiesorWestChina?".You
Manyteenagersactagainsttheirparent’swishes.Ifwe【C1】______neatness,ourteenagerswillbesloppy(邋遢的).They’llleavethei
______theprisonerescapedisamystery.
Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.NoschoolIhavetaughtinhasever【B1
AmajornewdevelopmentinsystemofworkinBritainis【B1】______Flexibleworkinghours,or"Flextime",arecatchingon(流行)fast,
Anewtechnique______,theyieldsasawholeincreasedby20percent.
Thewife-carryingWorldChampionshiphasbeenobservedinasmalltownincentralFinlandeversince1992.In1992,theresident
A、Developingfarmingindesert.B、Carryingoutalong-termproject.C、Gettingyouthsreadytoservepeople.D、Helpingstudentsm
随机试题
驾驶摩托车通过人行横道线时,应注意礼让行人。
注聚合物后,由于聚合物在油层中的滞留作用以及注入水粘度的增加,油水流度比降低,油层渗透率下降,流体的渗流阻力()。
调查研究的重要原则“调查的面要宽,调查所获取的信息要广”,适用的企业会计制度设计方案是()
Doctorssayangercanbeanextremelydamagingemotionunlessyoulearnhowto【C1】______withit.Theywarnthatangryhostilefe
静脉出血的颜色是()。
全口义齿修复时,以下因素需由医生决定,除了
施工现场使用的混凝土小型空心砌块龄期的最小限值应是()d。
公安机关人民警察内务建设的基本要求是培养()、英勇善战、无私无畏、雷厉风行的优良警风。
《马氏文通》的横空出世,使中国语言学研究进入一个新时期,形成了传统语文学研究和现代语言学研究_______的局面。此后的很长时期,两条研究路径虽有_______,但总体上是在两条道上跑车。
下列关于运算符函数的描述中,错误的是()。
最新回复
(
0
)