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
The climate of Earth is changing. Climatologists are confident that over the past century, the global average surface temperatur
The climate of Earth is changing. Climatologists are confident that over the past century, the global average surface temperatur
admin
2013-02-16
64
问题
The climate of Earth is changing. Climatologists are confident that over the past century, the global average surface temperature has increased by about half a degree Celsius. This warming is thought to be at least partly the result of human activities, such as the burning of fossil fuels and the clearing of forests for agriculture. As the global population grows and national economies expand, the global average temperature is expected to continue increasing by an additional 1.0 to 3.5°C by the year 2100.
Climate change is one of the most important environmental issues facing humankind. Understanding the potential impacts of climate change for natural ecosystems is essential if we are going to manage our environment to minimize the negative consequences of climate change and maximize the opportunities that it may offer. Because natural ecosystems are complex, nonlinear systems, it follows that their responses to climate change are likely to be complex. Climate change may affect natural ecosystems in a variety of ways. In the short term, climate change can alter the mix of plant species in land ecosystems such as grasslands. In the long term, climate change has the potential to dramatically alter the geographic distribution of major vegetation types — savannas, forests, and tundra. Climate change can also potentially alter global ecosystem processes, including the cycling of carbon, nitrogen, phosphorus, and sulfur. Moreover, changes in these ecosystem processes can affect and be affected by changes in the plant species of the ecosystem and vegetation type. All of the climate change-induced alterations of natural ecosystems affect the services that these ecosystems provide to humans.
The global average surface temperature increase of half a degree Celsius observed over the past century has been in part due to differential changes in daily maximum and minimum temperatures, resulting in a narrowing of the diurnal temperature range. Decreases in the diurnal temperature range were first identified in the United States, where large-area trends showed that maximum temperatures have remained constant or increased only slightly, whereas minimum temperatures have increased at a faster rate. In this issue, Alward’s report on the different sensitivities of rangeland plants to minimum temperatures increases.
Which of the following is NOT mentioned as a reason for the global warming?
选项
A、The burning of fuels such as coal or oil.
B、The clearing of forests.
C、The cultivation of farmland.
D、The negative consequences of human activities.
答案
C
解析
本题的四个选项中,只有C项为正确答案。这可从文中第一段的内容推知,即全球变暖,气温升高的原因包括人们燃烧煤、油等燃料,森林的砍伐和人类活动的负面影响。
转载请注明原文地址:https://kaotiyun.com/show/NFmO777K
0
考博英语
相关试题推荐
PsychologistAlfredAdlersuggestedthattheprimarygoalofthepsyche(精神)wassuperiority.Although【1】hebelievedthatindivi
Asanimportantmeansforpreservingknowledge,variousliteratureshavebecomepreciousresourcesforthemankind,whichhaveg
ThecalendarusedinAustraliaandinmostothercountrieswasintroducedbyPopeGregoryXIIIin1582.Itprovidesfor366days
Motorwaysare,nodoubtthesafestroadsinBritain.Mile【41】mile,vehicleforvehicle,youaxemuch【42】likelytobekilledors
Motorwaysare,nodoubtthesafestroadsinBritain.Mile【41】mile,vehicleforvehicle,youaxemuch【42】likelytobekilledors
Motorwaysare,nodoubtthesafestroadsinBritain.Mile【41】mile,vehicleforvehicle,youaxemuch【42】likelytobekilledors
WhenFrankDaletookoveraspublisherofLosAngelesHerrald-Examiner,theorganizationhadjustendedaten-yearstrike.There
Asthepaceoflifecontinuestoincrease,wearefastlosingtheartofrelaxation.Onceyouareinthehabitofrushingthroug
Themostconvincingevidencefortheimportanceofadultinfluenceonachild’sintelligencecomesfromastudyof"atrisk"chi
统一多民族国家的长期延续,极大地促进了各民族之间的经济、政治和文化交流,增进了各民族对中央政权的向心力和对中华文化的认同感,增强了中华民族的凝聚力、生命力和创造力,促进形成了中华文明的统一性和多样性。
随机试题
德国牧羊犬,2岁,雄性,近2个月来在右肘头出现一鸡蛋大小的逐渐增大的波动性肿胀,无热无痛,未见明显跛行。确诊本病不宜采用的方法是()。
提起劳动争议仲裁的当事人应当自劳动争议发生之日起多长时间提起仲裁?()
组织规划实施是国民经济规划管理了作的()。
下列选项关于工程监理单位的相关质量责任和义务的说法,正确的是()。
纺织品出口自动许可证实行“一批一证”和“一证一关”管理。
关于城镇土地使用税的计税依据,下列表述正确的有()。
抽样时,由于样本容量不足造成的误差与因为()造成的误差,都属于代表性误差。
设A是5阶方阵,且A2=O,则r(A*)=________.
Questions1-8ReadingPassage1hassevenparagraphsA-H.Fromthelistofheadingsbelowchoosethemostsuitableheadingfore
A、$100.B、$113.C、$130.D、$120.C根据原文(7)处可知,每月租金是130美元,故选C。
最新回复
(
0
)