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
Environment refers to the thin layer of life and life supports called the biosphere, including the earth’s air, soil, water, and
Environment refers to the thin layer of life and life supports called the biosphere, including the earth’s air, soil, water, and
admin
2009-02-10
33
问题
Environment refers to the thin layer of life and life supports called the biosphere, including the earth’s air, soil, water, and living organisms. The atmosphere that shelters the earth from excessive amounts of ultraviolet radiation and enables life to exist is a gaseous mixture of nitrogen, oxygen, hydrogen, carbon dioxide, water vapor, other elements and com pounds, and dust particles. Heated by the sun and by radiant energy from the earth, the atmosphere circulates about the planet and modifies temperature differences. Of the earth’s water, 93 to 97 percent makes up the oceans, 2 percent is ice, and 1 percent is the fresh water in rivers, lakes, groundwater, and atmospheric and soil moisture. The soil is the thin man tie of material such as glacial till and sedimentary rocks, and vegetation. Dependent on all these are the earth’s living or ganisms, including humans. Plant use water, carbon dioxide, and sunlight to convert raw materials into carbohydrates through photosynthesis. Animal life, in turn, is dependent on plants.
The species Homo Sapiens -- this is humanity -- appeared late in the earth’s history but was ultimately able to modify the earth’s environment by its activities. Although humans apparently first appeared in Africa, they quickly spread throughout the world. Because of their unique mental and physical capabilities, humans were able to escape the environ mental constraints that limited other species and to change the environment to meet their needs.
Although early humans undoubtedly lived in some harmony with the environment, as did other animals, changes in human relationships with the environment and their retreat from the wilderness began with the first, prehistoric agricultural revolution. The ability to control and use fire permitted them to modify or eliminate natural vegetation, and the domestication and herding of grazing animals resulted in overgrazing and soil erosion. The domestication of plants also promoted destruction of natural vegetation to make room for crops, and the demand for wood for fuel and to build cities and ships denuded mountains. Wild animals were slaughtered for food and destroyed as pests and predators.
While human populations remained small and technology modest, human impact on the environment was localized. As populations increased and technology improved and expanded, however, problems arose. In fact, environmental problems have plagued humans and the earth since the dawn of written history. With the Industrial Revolution, humans began in ear nest to change the face of the earth, the nature of its atmosphere, the quantity and quality of its water. Today, unprece dented demands on the environment from a rapidly expanding human population and from advancing technology are causing a continuing and accelerating decline in the quality of the environment and its ability to sustain life.
There are many reasons underlying today’s environmental problems EXCEPT ______.
选项
A、accelerating decline in the quality of the environment
B、rapidly expanding human population
C、advancing technology
D、growing demands in the environment
答案
A
解析
这道题目问的是环境问题的成因,从文章内容来看,B和C都是直接给出的原因,D也可以根据文中的一些论述推断出来,而A是环境问题的表现,不是其原因,因此答案应当选A。
转载请注明原文地址:https://kaotiyun.com/show/aF6K777K
0
专业英语四级
相关试题推荐
IfNajibullahZaziiseverythingtheFBIsaysheis,thentheAfghan-bornDenverairport-shuttle-busdriverrepresentsanewkin
A、British.B、Nomads.C、Indians.D、Russian.B细节题。本题询问人物。在录音原文中提到:Thetraditionalviewgoeslikethis.AnUr-language,ancestortoa
SowhydoItalkaboutthebenefitsoffailure?Simplybecausefailuremeantastrippingawayoftheinessential.Istoppedpret
ButthetrompcardistheAndesmountainrange.Thereareanumberofexcellentskiresortswithinonehour’sdriveofthecapi
Globalizationisthepresentworldwidedrivingtowardaglobal-【M1】______izedeconomicsystemdominatedbysupranationalcorpo
TheConsumerPriceIndex(CPI)isameasureoftheaveragechangeovertimeinthepricespaidbyurbanconsumersforamarket
It’shardtomissthem:theepitomeofcasual"geekchic"andorganizedwithinthewarrantyoftheirPalmPilots,theysiplabor
Inmanycountries,whenpeoplegivetheirname,theyrefertothemselvesusingtheirlastnameorfamilyname.IntheUnited
Whowastheinventorofchewinggum?
随机试题
创伤时,如果处理时间过晚,伤口已经感染,则应
下面哪种疾病可造成视力减退和失明
A.滑B.促C.弦D.涩E.数胸痹心痛患者.脉象多见
癫痫大发作时护理措施错误的是()
在年度股东大会召开前,单独持有或者合并持有公司4%以上股份的股东,可以在股东大会召开10日前提出临时提案,并书面提交董事会。()
口语交际课的教学设计,首先要__________,话题要贴近__________,密切联系学生的__________和__________,使每个学生有话可说,有话要说。
IT
LifeExpectancyintheLastHundredYearsAhundredyearsago,lifeexpectancyindevelopedcountrieswasabout47;intheea
TheInvaderofAIDSTheinvaderissmall,eveninthemicroscopicworldofbacteriaandviruses.Itisaliveonlyinthestr
()音乐学院()教学法()走读生()职业学校
最新回复
(
0
)