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
外语
The atmosphere is all the air surrounding the earth. Without it, we would be forced to seek shelter from the sun, as there would
The atmosphere is all the air surrounding the earth. Without it, we would be forced to seek shelter from the sun, as there would
admin
2008-11-13
90
问题
The atmosphere is all the air surrounding the earth. Without it, we would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun’s deadly rays.
Large and powerful, the atmosphere consists of an ocean of gases hundreds of miles high. It presses down on our bodies with a force of more than fourteen pounds per square inch. The narrow column of air which rests upon our shoulders weighs almost 2000 pounds. But our bodies are built in such a way that this weight does not crush(压碎)us.
In this huge ocean of air there is more energy than in all the coal, oil, and gas we have on earth. Electrical energy is collected in the atmosphere as water is collected and stored in a dam. The existence of electricity in the air has been known for centuries. But a thorough study of electricity in the atmosphere was not possible until the development of radio and radar.
One scientist, Dr. Sydney Chapman, has tried to explain the electric field which surrounds the earth. He believes that great storms on the sun create large mounts of electric energy. This energy is contained in a very light gas called hydrogen. The earth pulls the gas toward it, and a ring is formed around the earth several thousand feet above its surface. The great space ring is a powerful current of electrical energy. Sometimes the ring comes down and curves into the lower atmosphere, causing strange electrical effects.
His idea explains many things. It has long been known that there is an electric field inside the earth. It moves in much the same manner as the electric energy contained in the atmosphere. Scientists now believe that the electric energy in the atmosphere causes the electric energy inside the earth to flow.
If we can learn to control the energy in the atmosphere, we will have an unending supply of energy. Many scientists are trying to learn how to control it. In the meantime, even those of us who are not scientists have begun to pay attention to air. We realize that air does not contain the same elements that it contained years age. Automobiles, airplanes, factories, and atomic explosions have added dust and waste gases to the atmosphere, It is time to learn how to protect our atmosphere, the roof over the world of man.
选项
A、the total amount of oxygen over the earth
B、mixture of gases surrounding the earth
C、a source of storms
D、the diffusion of waste gas
答案
B
解析
综合第一和第二段首句可得出本题答案。
转载请注明原文地址:https://kaotiyun.com/show/KYPO777K
0
成人本科学位英语
相关试题推荐
Concerningpopulation,Chinarankshighintheworld,______someareasaresparselysettled.
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
There’sagreatstoryaboutanoldFinnishwomanwho,withoutquiterealizingit,wasusinghercell-phonetoaccesstheInterne
HistorianstendtotellthesamejokewhentheyaredescribinghistoryeducationinAmerica.It’stheone【C1】______theteachers
TheFoodandDrugAdministrationclassifiesasacosmeticanyproductwhose______purposeistoimproveaperson’sappearance.
Mr.Jones,Iamreallypleased______you.AndIhopewewillbeabletoseeeachotherinnotlongtime.
Theyaresaid______eachotherlongtimebeforetheymetinHarvardUniversitywheretheyworkedtogetheronaresearchproject.
Morethan30000driversandfrontseatpassengersarekilledorseriouslyinjuredeachyear.Ataspeedofonly30milesperho
Woman:Henry,yourarticleinthecampusnewswasexcellent.Man:Ionlywishtheyhadpublishedtheentirething.Question:Wha
她使我想起了她的姐姐。
随机试题
书店为争夺读者、提高营业额竞相打折销售,这是买主与卖主之间的竞争。()
患者,男性,26岁。近3个月来无明显原因出现颈部、腋下淋巴结肿大,伴顽固性腹泻,每日数十次稀便,体重明显下降达10kg,3年前在国外居住期间,因手术而输血400ml,术后无特殊反应。为明确诊断,首选的检查是()
一般建设项目进行两阶段设计,即初步设计和施工图设计。在初步设计阶段,编制()。
杜尚的作品《__________》的问世表明达达主义对传统的否定。
神像:信徒()
党员:干部:青年
我国民间竞技体育存在着明显的地域差异,下列对应关系正确的是:
设A,B是n阶方阵,且AB=O,B≠O,则必有()
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybeagameofsome【B1】______—football,hockey,golf,ortennis.It
A、U.S.dollars.B、Russianroubles.C、Japaneseyen.D、HongKongdollars.B录音的第四句提到了A、C、D三项,只有B没有提到,故选B。
最新回复
(
0
)