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
考研
[A] This re-grown "secondary" forest is crucial to the pair’s analysis. Within a few decades of land being abandoned, half of t
[A] This re-grown "secondary" forest is crucial to the pair’s analysis. Within a few decades of land being abandoned, half of t
admin
2023-03-22
86
问题
[A] This re-grown "secondary" forest is crucial to the pair’s analysis. Within a few decades of land being abandoned, half of the original biomass has returned. Depending on what else is nearby, these new forests may then be colonized by animals and additional plants, and thus support many of the species found in the original forest.
[B] Elizabeth Bennett, of the Wildlife Conservation Society, an American conservation group, agreed and mentioned that for large birds and mammals, uncontrolled hunting for food and for trade is causing a phenomenon known as "empty-forest syndrome". She said that although many forests look healthy when viewed from a satellite, they are actually falling silent because many of their large animals have been removed for subsistence or profit.
[C] What everyone agreed, though, was that climate change is a threat. Even the optimistic Dr. Wright is worried because many tropical species evolved in an environment that has very little temperature variation, they are not equipped to cope with an increase of as little as 3°C, which is the sort of change that many climate scientists predict. He said that by the end of the century, 75% of tropical forests will be warmer than today, and what will remain in these hot, wet places is unknown.
[D] A rare piece of good news from the world of conservation: the global extinction crisis may have been overstated. The world is unlikely to lose 100 species a day, or half of all species in the lifetime of people now alive, as some have claimed. The bad news, though, is that the lucky survivors are tiny tropical insects that few people care about. The species that are being lost rapidly are the large vertebrates that conservationists were worried about in the first place.
[E] Dr. Wright and Dr. Muller-Landau therefore reckon that in 2030 reasonably unbroken tropical forest will still cover more than a third of its natural range, and after that date its area—at least in Latin America and Asia—could increase. Much of this woodland will be secondary forest, but even so they suggest that in Africa only 16-35% of tropical-forest species will become extinct by 2030, in Asia, 21-24% and, in Latin America, fewer still. Once forest cover does start increasing, the rate of extinction should diminish gradually.
[F] This new view of the prospects for biodiversity emerged from a symposium held this week at the Smithsonian Institution in Washington, DC, but the controversy over how bad things really are has been brewing since 2006. That was when Joseph Wright of the Smithsonian Tropical Research Institute in Panama and Helene Muller-Landau of the University of Minnesota first suggested that the damage might not be as grim as some feared. They reasoned that because population growth is slowing in many tropical countries, and people are moving to cities, the pressure to cut down primary rainforest is falling and agriculturally marginal land is being abandoned, allowing trees to grow.
[G] There are, however, two criticisms of this analysis. The first questions whether the raw data about forest cover are a good indicator of biodiversity, at least for big animals. William Laurance, a colleague of Dr. Wright’s, pointed out to the symposium that birds and mammals are more vulnerable to alterations in their habitat than are insects and other small animals. His data suggest that even in some of the world’s best-protected primary forests, these species face severe pressures.
【D6】 → 【D7】 → 【D8】 → 【D9】 → G → 【D10】
【D10】
选项
答案
B
解析
本题剩下的选项只有B和C。上一段(即G)位置已固定,提出了对前文观点的反驳,认为森林覆盖面积的大小并不太可以反映生物的多样性,指出大型动物对环境改变的适应能力较差。言下之意,有森林并不一定意味着有很多种生物。B提到Elizabeth Bennett...同意(agreed)上文的观点,她还说到了“空林综合症”的现象,这种现象即为“有森林但没什么大型动物”的情况,可见,她agreed的对象正是G中的观点,故B为本题答案。C主要讲climate change对物种生存的威胁,与G提到alterations in their habitat有一定关联,但C首句的内容与G末尾处未构成语义转折,though在此处体现的逻辑不对,故排除C。
转载请注明原文地址:https://kaotiyun.com/show/xKMD777K
0
考研英语一
相关试题推荐
2007年10月真题在中国改革开放的字典里,“终身制”和“铁饭碗”作为指称弊端的概念,是贬义词。其实,这里存在误解。在现代企业理论中有一个“期界问题(HorizonProblem)”,是指由于雇佣关系很短导致职工的种种短视行为,以及此类行
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
ThequestionofhowAmericansspentand,crucially,savedmoneyoverthepasttwoyearsloomslargeovertheeconomytoday.Ins
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
Peekthroughtheinspectionwindowsofthenearly100three-dimensional(3D)printersquietlymakingthingsatRedEye,acompany
LastSeptember,theU.S.governmentannouncedthatitsbirthratefellto"anotherrecordlow".Morallyspeaking,there’snothing
随机试题
简述女性尿道的特点及临床意义。
齐某驾驶车辆携带其在靶场购买的比赛和训练枪支10支返回其单位所在地乙市,途中被甲市公安局截获。公安局以齐某违反相关法律法规,涉嫌经营国家限制买卖物品为由,依法律规定的条件和程序对齐某采取刑事拘留措施,并扣押了涉案枪支。次日检察院批准对齐某逮捕。后该靶场向公
根据《政府采购法》,从符合相应资格条件的供应商名单中确定不少于3家的供应商参加谈判,最后从中确定成交供应商的采购方式是()。[2011年真题]
当利用S型曲线比较法分析设备工程项目实际进度和计划进度时,通过比较计划S型曲线和实际S型曲线,可获得的信息有()。
我们在与父母、同学、老师交往过程中,应该做到“己所不欲,勿施于人。”这是《论语》中一句话,意思是:自己不喜欢的事,就不要强加在别人身上。这句话的实质是()。
Inthemid-1950s,Iwasasomewhatboredearly-adolescentmalestudentwhobelievedthatdoinganymorethannecessarywaswaste
填入问号处最恰当的是:
选择域名服务器的结构的原则是()。
某测验用百分等级表示测验结果,其受测者的测验结果低于平均分的一个标准差。他在该组被试中的百分等级是()
我国进入社会主义初级阶段的起点是()
最新回复
(
0
)