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 world’s tropical rainforests comprise some 6% of the Earth’s land area and contain more than half of all known life forms, o
The world’s tropical rainforests comprise some 6% of the Earth’s land area and contain more than half of all known life forms, o
admin
2010-07-06
63
问题
The world’s tropical rainforests comprise some 6% of the Earth’s land area and contain more than half of all known life forms, or a conservative estimate of about 30 million species of plants and animals. 61)
Some experts estimate there could be two or even three times as many species hidden within these complex and fast- disappearing ecosystems — scientists will probably never know for certain so vast is the amount of study required Time is running out for biological research.
62)
Commercial development is responsible for the loss of about 17 million hectares of virgin rainforest each year — a figure approximating 1% of what remains of the world’s rainforests.
The current devastation of once impenetrable rainforest is of particular concern because, although new tree growth may in time repopulate felled areas, the biologically diverse storehouse of flora and fauna is gone forever. 63)
Losing this bountiful inheritance, which took millions of years to reach its present highly evolved state, would be an unparalleled act of human stupidity.
Chemical compounds that might be extracted from yet- to-be-discovered species hidden beneath the tree canopy could assist in the treatment of disease or help to control fertility. Conservationists point out that important medical discoveries have already been made from material found in tropical rainforests. The drug aspirin, now synthesised, was originally found in the bark of a rain- forest tree. Two of the most potent anti-cancer drugs derive from the rosy periwinkle discovered in the 1950s in the tropical rainforests of Madagascar.
The rewards of discovery are potentially enormous, yet the outlook is bleak. Timber-rich countries mired in debt view potential financial gain decades into the future as less attractive than short-term profit from logging. Cataloguing species and analysing newly-found substances takes time and money, both of which are in short supply. The developed world takes every opportunity to lecture countries which arc the guardians of rainforests. 64)
Rich nations exhort them to preserve and care for what is left, ignoring the fact that their wealth was in large part due-to the exploitation of their own natural world.
It is often forgotten that forests once covered most of Europe. Large tracts of forest were destroyed over the centuries for the same reason that the remaining rainforests are now being felled—timber. 65)
As well as providing material for housing, it enabled wealthy nations to build large navies and shipping fleets with which to continue their.
Plunder of the world’s resources. Besides, it is not clear that developing countries would necessarily benefit financially from extended bioprospecting of their rainforests. Pharmaceutical companies make huge profits from the sale of drugs with little return to the country in which an original discovery was made.
选项
答案
失去这一丰富遗产将是人类无比愚蠢的行为,因为它需要数百万年的时间才能达到目前这种高度进化的状态。
解析
在句子结构上,考生主要注意逗号后分词结构作状语及从句两个语法现象。句子主干是Rich nations exhort them,而what is left作动词preserve和短语care for的宾语。在状语部分,that引导的从句是the fact的同位语从句,补充说明其内容。词汇方面,exhort指“规劝”,preserve和care for是同义词,作者连用它们是为了强调,what is left根据文意可知是指“剩下的雨林”,in large part是固定搭配,指“在很大程度上”natural world实际上是指自然资源。
转载请注明原文地址:https://kaotiyun.com/show/YYDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
WhatwastheunderlyingsignificanceoftheinventionoftheKodak?Snapshot,asisexplainedinthepassage,refersto
Whatdoesthephrase"fromvariouscomersofthiscountry"probablymean?Howdidthegraduate’sparentsreacttotheirchild’s
Whenitcomestofoods,Americaisnotjustthefattestcountryonearthbutprobablythemostschizophrenicaswell--hometoth
ThechangingprofileofacityintheUnitedStatesisapparentintheshiftingdefinitionsusedbytheUnitedStatesBureauof
Howmanystreetsaddressesdoesthecomputercontainabout?
Predictionsofmanyrobotsinindustryhaveyetcometrue.Fortenyearsormore,manufacturersofbigrobotshaveexplainedhow
Predictionsofmanyrobotsinindustryhaveyetcometrue.Fortenyearsormore,manufacturersofbigrobotshaveexplainedhow
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【21】______toal
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropert
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropert
随机试题
Wewerelateasusual.Myhusbandhad【C1】______wateringtheflowersinthegardenbyhimself,andwhenhediscoveredthatheco
细胞未受刺激时存在于细胞内外两侧的电位差为
王先生,68岁,肺癌晚期,入院后了解到病情后,情绪异常,抱怨家人不关心,指责医护人员不尽力,在治疗护理中配合差。请问:针对患者的特殊心理反应,护士应如何护理?
药用部位为内壳的中药材是
某省的药品经营企业在发布感冒药的广告时,发现其内容存在虚假违法的内容。对于该企业的处罚部门是()。
在与治理层沟通时,下列说法中,错误的有()。
下列选项中,不属于从基本形态对设计进行分类的是()
2011年,某市工业企业(规模以上,下同)用水总量193.27亿立方米,比上年减少1.66亿立方米。其中,取水总量41.26亿立方米,增加0.57亿立方米;河湖海冷却水86.25亿立方米,增加1.09亿立方米。2011年该市工业企业
16位真彩色显示器可显示的颜色种数为()。
设f(x)在[0,1]上连续,在(0,1)内可导,f(0)=0,f(1)=0.证明:对任意的k∈(-∞,+∞),存在ξ∈(0,η),使得f’(ξ)-k[f(ξ)-ξ]=1.
最新回复
(
0
)