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
The planet’s wild creatures face a new threat from yuppies, empty nesters, singletons and one parent families. Biologists studyi
The planet’s wild creatures face a new threat from yuppies, empty nesters, singletons and one parent families. Biologists studyi
admin
2010-05-05
29
问题
The planet’s wild creatures face a new threat from yuppies, empty nesters, singletons and one parent families. Biologists studying the pressure on the planet’s dwindling biodiversity today report on a new reason for alarm. Although the rate of growth in the human population is decreasing, the number of individual households is exploding. Even where populations have actually dwindled—in some regions of New Zealand, for instance—the number of individual households has increased, because of divorce, career choice, smaller families and longer lifespans.
Jianguo Liu of Michigan State University and colleagues from Stanford University in California re port in Nature, in a paper published online in advance, that a greater number of individual house holds, each containing on average fewer people, meant more pressure on natural resources. Towns and cities began to sprawl as new homes were built. Each household needed fuel to heat and light it; each household required its own plumbing, cooking and refrigeration. "In larger households, the efficiency of resource consumption will be a lot higher, because more people share things," Dr. Liu said. He and his colleagues looked at the population patterns of life in 141 countries, including 76 "hotspot" regions unusually rich in a variety of endemic wildlife. These hot spots included Australia, New Zealand, the US, Brazil, China, India, Kenya, and Italy. They found that between 1985 and 2000 in the "hotspot" parts of the globe, the annual 3.1% growth rate in the number of households was far higher than the population growth rate of 1.8 %.
"Had the average household size remained at the 1985 level," the scientists report, "there would have been 155m fewer households in hotspot countries in 2000. Paradoxically, smaller households do not mean smaller homes. In Indian River County, Florida, the average area of a one-storey, single family house increased 33 % in the past three decades."
Dr. Liu’s work grew from the alarming discovery that the giant pandas living in China’s Wolong reserve were more at risk now than they were when the reserve was first established. The local population had grown, but the total number of homes had increased more swiftly, to make greater inroads into the bamboo forests.
Gretchen Daily of Stanford, one of the authors, said: "We all depend on open space and wild places, not just for peace of mind but for vital services such as crop pollination, water purification and climate stabilization. The alarming thing about this study is the finding that, if family groups continue to become smaller and smaller, we might continue losing biodiversity—even if we get the aggregate human population size stabilised."
选项
A、the amount of wildlife is diminishing.
B、the population of human is decreasing.
C、New Zealanders live an unstable life.
D、the structure of families is changing.
答案
D
解析
本题问第一段主要告诉我们什么。第一段主要谈论"虽然人口的增长放慢,但家庭的总数却在激增。即使在人口减少的地区也是如此"。其原因之一是"smaller families",即家庭变小了,也就是说家庭的结构变了。因此,"家庭结构正在改变"正确。野生动植物总量正在减少:本文所说的生物多样性的减少是物种的减少而不是总量的减少,况且这也不是第一段的重点。人口总数正在减少:第一段第三句提到"the rate of growth in the human population is decreasing",增长率在降低,只是说增长速度放慢,但人口的数量仍然在增加。而且在首段讨论的不是人口的数量问题,而是家庭的数量问题。新西兰人的生活不稳定:文中只作为例证提到新西兰某些地区人口减少,并没有说生活不稳定。
转载请注明原文地址:https://kaotiyun.com/show/9N44777K
0
考研英语一
相关试题推荐
HowdoyouexplaineconomicsinplainEnglish?TheFederalReserveBankofNewYorkhasbeenansweringthequestionwithaneven
TheEU’sclimatechiefisseekingtoextendthebloc’srenewableenergytargets,inamoveapparentlydesignedtoprotectthegr
Doctorsalreadyknowthatpeoplewhosmokecandamagetheirhearing.ThelateststudyinthejournalTobaccoControl,【C1】_______
Fordecadesthemarketforexpensiveheadphoneswasmainlylimitedtohi-fifans.But【C1】________theboxystereosysteminthec
Asageneralrule,AmericanmenearnmorethanAmericanwomen.Thisholdstrueacrossindustries,acrosseducationlevels,anda
Forgetmilkydrinks,hotwaterbottlesorcurlingupwithagoodbook.Therealsecrettoagoodnight’ssleepmaybewhereyou
Themostpowerfulfalse-newsweaponinhistoryisaroundthecomer.Iftechnologycontinuesitscurrentadvance,wemaysoonfac
Britain’sflexiblelabormarketwasaboonduringtheeconomicrecession,helpingkeepjoblessnessdownandthen,whentherecov
Internetadvertisingisbooming.Theindustryhasgonefrom$9.6billioninrevenuein2001to$27billionthisyear,according
WhichofthefollowingistrueaccordingtoParagraph1?Jugglingone’slifeprobablymeanslivingalifecharacterizedby____
随机试题
判断休克有无和程度的指标是
用于描述变异程度的指标是
[2012年,第97题]计算机系统内的系统总线是()。
某轿车生产企业为增值税一般纳税人,2011年ll~12月份的生产经营情况如下:(1)11月从国内购进汽车配件,取得防伪税控系统开具的增值税专用发票,注明金额280万元、增值税税额47.6万元,支付运费并取得运输发票,发票上注明运费10万元,建设基金2万元。
下面所给的四个选项中,哪一选项的组成元素能由左边给定图形的组成元素组成?
阅读下列材料,回答问题。对如何突破“居民和聚落”教学重难点,王老师做了如下处理:(1)从教材中“世界人口增长曲线图”得出不同阶段人口增长速度不一样,对七年级学生来说是难点,学生此类知识基础不够,若换成世界人口增长曲线图的动画,学生从动画中可以很容易看出
下列对婴幼儿心率特点叙述正确的是()。
秦岭—淮河一线是我国:
简述政策性银行与商业银行的区别。
Iscomputercodingaforeignlanguage?A)Ascomputercodinghasbecomeanincreasinglysought-afterskill,moreK-12school
最新回复
(
0
)