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
2013-01-19
69
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℃ 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 temperature have increased at a faster rate. In this issue, Alward et al. 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
只有C在文中没有提到。
转载请注明原文地址:https://kaotiyun.com/show/ZJ2O777K
0
考博英语
相关试题推荐
Youcan______differentkindsofpeople,dictionariesorencyclopediatofindoutwhatyouwishtoknow.
Workathomemomsfacechallengesthatareveryunique.Thedecisiontoworkoutsidethehomeorstaywithyourchildrenisdiff
Decision-makingisacomplexbusinesssubjectthatcombinesthemostcomplicatedelementsoftheoperationalandtheoreticalasp
UndergroundRailroadinU.S.historywasalooselyorganizedsystemforhelpingfugitiveslavesescapetoCanadaortoareasof
Recentlyscientistshavebeen【1】andperfectingothersourcesofenergy:nuclearoratomicpower,solar(sun)power,andsyntheti
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsareforcingthosewhopondersuchmatterstoafurther
Thirty-onemillionAmericansareover60yearsofage,andtwenty-ninemillionofthemarehealthy,busy,productivecitizens.B
Youareaskedtowriteinnolessthan200wordsaboutthetitleofHarmfulPlagiarisminAcademicFieldinChina.Youshouldba
Atallageandatallstagesoflife,fearpresentsaproblemtoalmosteveryone."Wearelargelytheplaythingsofourfears,"
随机试题
电位滴定与容量滴定的根本区别在于()不同。
取某药物水溶液,加盐酸使成酸性,再加三氯化铁试液1滴,即显紫红色。放置3小时,不得发生沉淀。该药物应是
下列()人员应当向公司申报所持有的本公司的股份,并在任职期间内不得转让。
【2006年第4题】题16~19:某中学普通教室宽约10m,长约15m,高约3.5m,顶棚、墙面四白落地,水泥地面,前面讲台和后面班级板报均有黑板。请回答下列照明设计相关问题。请分析说明为使教室照度分布均匀,宜采用下列哪种规格的灯具?
下列不属于流浪乞讨人员救助领域的社会工作方法的是( )。
德育就是要用“爱”的浪花推动青少年前进的风帆,用“善”的乳汁润滑青少年生命前进的车轮,用“美”的春雨沐浴青少年飞翔的双翼,用“真”的阳光照耀青少年生命成长的大道。美好的使命自然使德育成为最有魅力的教育。我们要让青少年明白生命是美丽的,是神圣的,是伟大的,应
公文可以转变为值得信赖的历史档案,或者成为可资采信的()。
中国雅虎推出社交网站标志着该行业正迎来拐点。Facebook的出现让社区网络被人们所熟知。随着网易“梦幻人生”浮出水面,又有一家传统门户网站进入了社区网站领域。业内人士分析,门户网站拥有充足的资金,它们的加入将对传统社区网站造成不小冲击,并提升市场进入门槛
A、ThereisnoaccesstotheInternet.B、Thetrafficoutsideistoonoisy.C、Theairconditionerisoutoforder.D、Thereisnoh
Valentine’sDayissupposedtobeaboutloveandromance.Butunfortunately,itcanbejusttheopposite.Becauseofthat,Feb.
最新回复
(
0
)