首页
登录
职称英语
Why do the changes in climate occur? [br] [originaltext] Today I want to tal
Why do the changes in climate occur? [br] [originaltext] Today I want to tal
游客
2023-11-12
40
管理
问题
Why do the changes in climate occur? [br]
Today I want to talk about the Earth’s last major climatic shift, at the end of the last ice age. But first, let’s back up a moment and review what we know about climatic change in general. We defined "climate" as consistent patterns of weather over significant periods of time.
In general, changes in climate occur when the energy balance of the Earth is disturbed. Solar energy enters the Earth’s atmosphere as light and is radiated by the Earth’s surface as heat. Land, water, and ice each affect this energy exchange differently. The system is so complex that, to date, our best computer models are only crude approximations and are not sophisticated enough toTEST hypotheses about the causes of climatic change. Of course, that doesn’t keep us from speculating. For instance, volcanic activity is one mechanism that might affect climatic change. (12) When large volcanoes erupt, they disperse tons of particles into the upper atmosphere, where the particles then reflect light. Since less light is entering the system of energy exchange, the result would be a cooling of the Earth’s surface.
Of course, this is just one possible mechanism of global climate change. In all probability, (13) a complete explanation would involve several different mechanisms operating at the same time.
选项
A、several different mechanisms operating at the same time
B、one specific mechanism operating at different time
C、several different mechanisms operating at different time
D、one specific mechanism operating during a certain period of time
答案
A
解析
细节题。原文的最后指出对气候变化的全面解释还是要考虑同一时期多种不同机制同时作用的综合效果。单一机制的作用是不够的,因此正确答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3181645.html
相关试题推荐
NajibullahZaziwasarrestedbecause[br][originaltext][28D]AnAfghanim
Whereshouldthefoodaidbedeliveredto?[br][originaltext]AUnitedNati
Whereshouldthefoodaidbedeliveredto?[originaltext]AUnitedNationsre
JohnWilliams’houseismadeof[br][originaltext]Morethan40yearsago,
JohnWilliams’houseismadeof[br][originaltext]Morethan40yearsago,
JohnWilliams’houseismadeof[originaltext]Morethan40yearsago,JohnW
Thespeakerwantsustoknowthatachild[br][originaltext][18B]Playis
Thespeakerwantsustoknowthatachild[originaltext][18B]Playisthepr
Whatdoplantsdowhentheyarethirsty?[br][originaltext]Weallscreamf
Whatistheman’sproblem?[br][originaltext]M:Excuseme,butisthiswhereI
随机试题
Haiti’sTourismA)LikemanyofitsCaribbeanneighb
Legalscholarsarguethatwhen"justice"isinterpretedtoobroadly,theconcept
Mostcareersorganizationshighlightthreestagesforgraduatestofollowin
Lackingfurtherhardevidenceofthebombingitself,thepolicecouldhardlytel
现有一块场地,其尺寸为40m×50m,规划部门规定其容积率为10。如该地上建大楼
单位工程施工组织设计是施工单位编制分部(分项)工程施工组织设计和季、月、旬施工计
基础测绘成果和国家投资完成的其他测绘成果,用于( )的,应当无偿提供。A.进行
笔试法具体步骤包括:①起草测试题目;②确定培训目标;③为学员准备考试说明;④进行
()强调创新和创业,企业组织比较松散,非正规化,注重发展与创新。A.家族式企业文
下图为某道路工程施工进度计划网络图,总工期和关键线路正确的有()。 A.总工
最新回复
(
0
)