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
Why do the changes in climate occur?
Why do the changes in climate occur?
admin
2013-03-27
27
问题
Why do the changes in climate occur?
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 to test 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、Because the energy system is complicated.
B、Because land, water, and ice each affect the energy exchange differently.
C、Because the energy balance of the Earth is disturbed.
D、Because solar energy is radiated by the Earth’s surface as heat.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/FKhK777K
0
专业英语四级
相关试题推荐
Itwastheworsttragedyin【C1】______history,sixtimesmoredeadlythantheTitanic.WhentheGermancruiseshipWilhelmGu
Inordertoworkheretheforeignerneedsaworkpermit,whichmustbeapplied【C1】______byhisprospectiveemployer.Theproblem
AnotheraspectofAmericansocietythatmay【C1】______non-Americansisthefamily.The【C2】______familystructure(parentsandch
Asubjectwhichseemstohavebeeninsufficientlystudiedbydoctorsandpsychologistsistheinfluenceofgeographyandclimate
Asubjectwhichseemstohavebeeninsufficientlystudiedbydoctorsandpsychologistsistheinfluenceofgeographyandclimate
Whichofthefollowingsentenceshasanobjectcomplement?
IntheUnitedStates,PresidentBarackObamahasreversedlong-standingDemocraticPartypolicybyapprovingsubstantialnewloa
Thenegotiations______becauseneithersidewouldcomprise.
Aconventionalteacher’slicenseusuallyrequiresauniversitydegreeineducationplusanunpaidtermofpracticeteaching.Thi
WriteonANSWERSHEETTHREEanoteofabout50~60wordsbasedonthefollowingsituation:ItisreportedthatNewlySelectedR
随机试题
A、Trendelenburg试验B、Perthes试验C、Pratt试验D、Buerger试验检查深静脉通畅的试验_______。
女,25岁,2周来发热,四肢关节酸痛,无皮疹,胸透示两侧少量胸腔积液,体检:体温39℃,心率120次/分,两下肺叩诊浊音,呼吸音降低,肝脾未触及,两手掌指关节及膝关节轻度肿胀,血红蛋白100g/L,白细胞3×109/L,血小板50×109/L,尿常规蛋白
下列哪项不是异体骨移植的主要用途
北京市流行病学资料显示,心脏猝死的女性年平均发生率为
应定期清选、整理、必要时消毒或灭菌的是由裸眼视力在0.9以上、无色盲者担任的是
客户对交易结算报告的内容有异议的,应当在()内向期货公司提出书面异议。
退货入库的商品因已经过检验,所以入库时无需再检验。
皮亚杰把儿童的心理发展划分为()个阶段。(2010年5月真题)
常温常压下,某容器真空时质量为201.0g,当它盛满甲烷时的质量为203.4g,而盛满某气体X时质量为205.5g,则X气体可能是()。
TheauthorthinksthatmostNewYorkers_____.Itisimpliedinthesecondparagraphthat_____.
最新回复
(
0
)