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 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
2011-03-26
26
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 amounts 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.
The main topic of the passage is ______.
选项
A、composition of the atmosphere
B、pressure from the atmosphere
C、air pollution in the atmosphere
D、the relationship between the atmosphere and men
答案
D
解析
选项A、B、C文中都有涉及,但它们主要说明的是D。
转载请注明原文地址:https://kaotiyun.com/show/k9qC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Everyonewantstobehealthyandhappy.【B1】,illnessoraccidentsmayoccurwithoutanywarning.Frequentlythepersonwhois
Muchtomysurprise,theywentawaywithouttellingustheir______address.
Fromthearticle,thereaderlearnsthatLeeWildeslives______.Dispensingdrugswithoutaprescriptionis______.
Youcouldn’tbelievehim,forhehadonlya(an)______understandingofhistask.
Withoutyourhelp,we______somuch.
Whywererivalprisongangsforcedintoacommonexerciseyard?Whydidtheguardsshootattheprisoners?
Whywererivalprisongangsforcedintoacommonexerciseyard?WhyistheCaliforniaDepartmentofCorrectionsspendingonemi
Tomygreat______(astonish),heenteredmyroomwithoutmyagreement.
(Itiswidelybelievedthat)languagesdevelopandchangeconstantly.
随机试题
属于真核细胞型的微生物是
防止化学烧伤主要是防止易烧伤人体的化学药品与人体接触,下列措施可能会造成烧伤危害的是
图示等边角钢制成的悬臂梁AB,c点为截面形心,x’为该梁轴线,y’、z’为形心主轴。集中力F竖直向下,作用线过角钢两个狭长矩形边中线的交点,梁将发生以下变形:
开发区区域环境影响评价技术导则的适用范围是()。
能源技术改造项目内容包括()。
某办公楼工程,建筑面积18500m2,现浇钢筋混凝土框架结构,筏板基础。该工程位于市中心,场地狭小,开挖土方须外运至指定地点。建设单位通过公开招标方式选定了施工总承包单位和监理单位,并按规定签订了施工总承包合同和监理委托合同,施工总承包单位进场后按合同要求
在质量管理中,用来整理数据、描述质量特性数据分布状态的质量分析图是()。
猎人甲因与同村妇女乙通奸而打算离婚,因妻丙不同意,扬言如果甲提出离婚,将与甲同归于尽。甲无奈,只得一方面佯装与丙和好如初,另一方面告知乙准备杀害丙与之结婚,并让乙购买毒鼠强用于毒害丙,但乙多次寻购而无处购买。此计不成后,甲又请巫师丁施法术咒死丙。一日甲正在
对120人进行一次兴趣调查,喜欢足球运动的与不喜欢足球运动的人数比为5:3,喜欢篮球运动的与不喜欢篮球运动的人数比为7:5,两种球类活动都喜欢的有43人,则对这两类球类活动都不喜欢的有()。
生态系统中的能量流动和物质循环是通过——进行的,不同生物间的关系十分复杂,主要是围绕发生联系。
最新回复
(
0
)