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
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、
admin
2013-06-10
47
问题
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、D、E、F、G……) to fit into each of the numbered blank. There are several extra choices, which do not fit in any of the gaps. (10 points)
A. Human population growth add more pressures on land.
B. Different factors play role in land degradation.
C. What is land conversion?
D. The protected areas cannot escape from the destruction.
E. The land conversion processes in stages.
F. The land conversion has a great impact on nature.
The projections of species loss by deforestation lurk a number of crucial but hard-to-plot variables, among which two are especially weighty, continuing landscape conversion and the growth curve of human population.
(41)______.
Landscape conversion can mean many rings: draining wetlands to braid roads and airports, turning tall grass prairies under the plow, fencing savanna and overgrazing it with domestic stock, cutting second-growth forest in Vermont and consigning the land to ski resorts or vacation suburbs, slash-and-burn clearing of Madagasar’s rain forest to grow rice on wet hillsides, industrial logging on Boreno to meet Japanese plywood demands.
(42)______.
The ecologist Jon Terborgh and a colleague, Carel P. van Schaik, have described a four-stage process of landscape conversion that they call the land-use cascade. The successive stages are. (1) wildlands, encompassing national floral and faunal communities altered little or not at all by human impact; (2) extensively used areas, such as natural grasslands lightly grazed, savanna kept open for prey animals by infrequent human-set fires, or forests sparsely worked by slash-and-bum farmers at low density; (3) intensively used areas, meaning crop riel&, plantations, village commons, travel corridors, urban and industrial zones; (4) degraded land, formerly useful but now abused beyond value to anybody.
(43)______.
Among all forms of landscape conversion, pushing tropical forests from the wildlands category to the intensively used category has the greatest impact on biological diversity. You can see it in the central Amazon, where big tracts of rain forest have been felled and burned, in a largely futile attempt to pasture cattle on sun-hardened clay. By the middle of the next century, if the trend continues, tropical forest will exist virtually nowhere outside of protected areas—that is, national park, wildlife refuges, and other official reserves.
(44)______.
Human population growth will make a bad situation worse by putting ever more pressure on all available land. The annual increase is, now 80 million people, with most of that increment coming in less developed countries. According to U.N.’s middle estimate, human population will rise from the present 5.9 billion to 9.4 billion by the year 2050. Anyone interested in the future of biological diversity needs to think about the pressures these people will face, and the pressures they will exert in return.
(45)______.
That direction, necessarily, will be toward ever more desperate exploitation of landscape. Even Noah’s ark only manages to rescue paired animals, not large parcels of habitats. The jeopardy of the ecological fragments that we presently cherish as parks, refuges, and reserves is already severe due to internal and external forces, internal, because insularity itself leads to ecological unraveling; and external, because those areas are still under siege by needy and covetous people. Projected forward into a future of 10.8 billion humans, that jeopardy increases to the point of impossibility.
We shouldn’t take comfort in assuming that at least the parks and reserves like Yellowstone National Park, will still harbor grizzly bears in the year 2150. Those predator populations, and other species down the cascade, are likely to disappear. "Wildness" will be a word applicable only to urban turmoil. Lions, tigers, and bears will exist in zoos. Nature won’t come to an end, but it will look very different.
选项
答案
D
解析
本段进一步分析了人口增长将造成的恶果:加剧土地开发,破坏自然保护区;选项D"保护区也会遭到破坏"是呼应了本段的分析结果。
转载请注明原文地址:https://kaotiyun.com/show/Rcd4777K
0
考研英语一
相关试题推荐
Moreandmoreresidences,businesses,andevengovernmentagenciesareusingtelephoneansweringmachinestotakemessagesorgi
Howdidmobileradiosystemsfinditsbusinesscompetitiveness?Welearnfromthetextthatusersofwirelessproductsaremore
Fromthefirstthreeparagraphs,welearnthatWhenmentioningthe"the3000-to-12000-megatonrange"(Para.3),thewriterist
ScottMcNealyandJimBarksdaleslammedBillGatesfor______.Accordingtothepassage,itcanbeinferredthat______.
About40percentofAmericansthinkofthemselvesasshy,whileonly20percentsaytheyhaveneversufferedfromshynessatsom
Nowsomeofthestudentspaymoreattentiontojob-huntingthantotheiracademicwork,accordingtothisfact,writeanessayt
Mostplantscanmaketheirownfoodfromsunlight,(1)_____somehavediscoveredthatstealingisaneasierwaytolive,Thousan
Formorethan40years,acontrollinginsightinmyeducationalphilosophyhasbeentherecognitionthatnoonehaseverbeen—no
LikeallquintessentiallyBritishthings,gardeningisapastimethathaslongbeenindecline.Fromahighpointof£5billion
Withthepossibleexceptionofequalrights,perhapsthemost【C1】______issueacrosstheUnitedStatestodayisthedeathpenalty
随机试题
从历史脉络来看,新时代是()的时代。
下面哪种情况不需要评价肾段动脉的阻力指数
药品消耗量统计的原始记录具有
64岁男性,昨晚突然左眼漆黑持续约5分钟。数年前曾有心肌梗死发作。血压为180/90mmHg。眼部检查:双眼视力为1.0,眼底发现动脉纤细和Salus交叉,视野无异常。眼压19mmHg(OU),考虑为
A.产生血小板抗体B.骨髓造血功能衰竭C.机体免疫功能缺陷D.凝血能力超过抗凝能力E.凝血因子缺乏再生障碍性贫血的主要发病机制
下列医疗费用中,不纳入基本医疗保险基本支付范围的是()。
在应收账款保理中,从风险角度看,有追索权的保理相对于无追索权的保理对供应商更有利,对保理商更不利。()
()是组织社会经济活动的根本原则,是在社会经济活动的一定(或全部)范围内,人们普遍承认,并且实际共同遵守着的一种行为规范。
第一部由劳动人民制定的根本大法颁布于()。
徐霞客出生在一个富庶之家。受父亲影响,他喜爱读地理、探险和游记之类的书籍。这些书籍使他从小就热爱祖国的壮丽河山,立志要遍游名山大川。22岁时徐霞客开始外出旅游。徐霞客一生游历中国30多年,广泛记录了自己的旅行。为了进行细致的考察,他很少乘车坐船,几乎全靠双
最新回复
(
0
)