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
54
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
发达国家规劝发展中国家好好保护剩下的雨林,却忽视了他们的财富在很大程度上来源于掠夺他们自己所处的自然世界这一事实。
解析
本题句子结构较简单,which to continue...是不定式的复合结构作介词with的宾语,其中which指代的是前面的navies and shipping fleets。考生要注意的是as well as这一结构,它指“除…外,还…”。
转载请注明原文地址:https://www.kaotiyun.com/show/eYDd777K
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
Inthispassage,"Hollywood"isusedtodescribe______."BijouDreams"inthesecondparagraphprobablyrefersto"______".
WhatarethetwoseasoningsusedbymostAmericans?
Whatdoesthephrase"fromvariouscomersofthiscountry"probablymean?Whatdoesthewriterprobablythinkofthedebateabo
Whenitcomestofoods,Americaisnotjustthefattestcountryonearthbutprobablythemostschizophrenicaswell--hometoth
Whenitcomestofoods,Americaisnotjustthefattestcountryonearthbutprobablythemostschizophrenicaswell--hometoth
ThechangingprofileofacityintheUnitedStatesisapparentintheshiftingdefinitionsusedbytheUnitedStatesBureauof
Directions:ThegraphshowsthedemandforenergyandtheenergyavailablefromfossilfuelsinFreedoniafrom1985to2005.Wr
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【21】______toal
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【21】______toal
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【21】______toal
随机试题
适合用观察法进行观察的是()
下列哪项是由工作流程形成的EDI工作方式?
A.无症状性溃疡B.幽门管溃疡C.胃角部溃疡D.球后溃疡夜间痛多见且易并发出血的是
消化性溃疡在病理上组织损害深达下列哪一层
(2006年)从事建筑活动的专业技术人员,应当()。
在下列四种口味特点中,属于山东口味的是()。
购物:银行卡
在某科室公开选拔副科长的招录考试中,共有甲、乙、丙、丁、戊、己、庚7人报名。根据统计,7人的最高学历分别是本科和博士,其中博士毕业的有3人;女性有3人。已知,甲、乙、丙的学历层次相同,己、庚的学历层次不同;戊、己、庚的性别相同,甲、丁的性别不同。最终录用的
【程序说明】程序功能是按姓名提供学生成绩的查询。【程序】SETTALKOFFUSESTDACCEPT“请输入待查学生姓名:”TOXMDOWHILE(4)IF(5)?“姓名:”+姓名,“成绩:”+STR(成绩,
Ifyou’refindingittoughtolandajob,followahuntingplanwiththefollowingtactics:Setyour【C1】_____Whileyoushou
最新回复
(
0
)