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
10
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
(1)Althoughnumbersofanimalsinagivenregionmayfluctuatefromyearto
设都是n(n≥3)阶非零矩阵,且AB=O,则r(B)=()A.0 B.1
A考查字母组合ew的读音。在A、C、D三项中ew读作[u:],在B项中ew读作[ju:]。
A. B. C. D.
经一级注册建筑师考试合格,取得考试资格证书者,不得有下列何种行为?( )A.可
看到的坡道有几处?() A.1 B.2 C.3 D.4
下列选项中,属于桥梁伸缩缝构造要求的有()。A:在设置伸缩缝处,栏杆与桥面铺装
母儿血型不合,下列哪些检查疑有胎儿溶血A.孕36周后羊水中胆红素含量0.51~1
具有透疹作用的药组是A.蝉蜕、金银花、菊花 B.薄荷、葛根、升麻 C.
中国北海粮油公司与巴基斯坦某公司签订了向中国出口12000吨(240000包)白
最新回复
(
0
)