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
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no
admin
2013-04-17
57
问题
One basic weakness in a conservation system based wholly on economic motives is that most members of the land community have no economic value. Yet these creatures are members of the biotic community and, if its stability depends on its integrity, they are entitled to continuance.
When one of these noneconomic categories is threatened and, if we happen to love it, we invent excuses to give it economic importance. At the beginning of the century songbirds were supposed to be disappearing. 61)
Scientists jumped to the rescue with some distinctly shaky evidence to the effect that insects would eat us up if birds failed to control them.
The evidence had to be economic in order to be valid.
It is painful to read these roundabout accounts today. We have no land ethic yet, 62)
but we have at least drawn nearer the point of admitting that birds should continue as a matter of intrinsic right, regardless of the presence or absence of economic advantage to us.
A parallel situation exists in respect of predatory mammals and fish-eating birds. 63)
Time was when biologists somewhat overworked the evidence that these creatures preserve the health of game by killing the physically weak, or that they prey only on "worthless" species.
Here again, the evidence had to be economic in order to be valid. It is only in recent years that we hear the more honest argument that predators are members of the community, and that no special interest has the right to exterminate them for the sake of a benefit, real or fancied, to itself.
Some species of trees have been "read out of the party" by economics-minded foresters because they grow too slowly, or have too low a sale value to pay as timber crops. 64)
In Europe, where forestry is ecologically more advanced, the noncommercial tree species are recognized as members of the native forest community, to be preserved as such, within reason.
Moreover, some have been found to have a valuable function in building up soil fertility. The interdependence of the forest and its constituent tree species, ground flora, and fauna is taken for granted.
To sum up: a system of conservation based solely on economic self-interest is hopelessly lop-sided. 65)
It tends to ignore, and thus eventually to eliminate, many elements in the land community that lack commercial value, but that are essential to its healthy functioning.
It assumes, falsely, that the economic parts of the biotic clock will function without the uneconomic parts.
选项
答案
在生态林业较为先进的欧洲,没有成为商业化对象的树种被视为原始森林群落的成员适当地加以保护。
解析
句子的主体是“the noncommercial tree species are recognized as members ofthe native forest community”,包含被动语态。句子开头是一个where引导的定语从句,to be preserved是修饰noncommercial tree species的成分。Within reason合情合理的,理智的。注意被动语态的处理。
转载请注明原文地址:https://kaotiyun.com/show/Hcxd777K
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
Itisoftenobservedthattheagedspendmuchtimethinkingandtalkingabouttheirpastlives,【21】______aboutthefuture.Th
Itisoftenobservedthattheagedspendmuchtimethinkingandtalkingabouttheirpastlives,【21】______aboutthefuture.Th
Inthe18thcentury,NewYorkwassmallerthanPhiladelphiaandBoston.TodayitisthelargestcityinAmerica.Howtoexplain
Likeourpoliticalsociety,theuniversityisundersevereattacktodayandperhapsforthesamereason;namely,thatwehaveac
WhichofthefollowingisNOTmentionedasthethingincludedinyourlist?
Inthelateyearsofthenineteenthcentury,"capital"and"labour"wereenlargingandperfectingtheirrivalorganizationsonm
HowlongdidEmilyDickinsonliveinthehousewhereshewasborn?
"Intelligence"atbestisanassumptiveconstruct--themeaningofthewordhasneverbeenclear.Thereis【21】______agreemento
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtinschoolsandtonon-nat
Humancreativenessisboundless.Withtheadvanceofscienceandtechnology,acompletenewmeansofcommunication—MobilePhon
随机试题
试迷国际商事仲裁与国际民事诉讼的区别。
2011年7月11日,A市升湖区法院受理了黎明丽(女)诉张成功(男)离婚案。7月13日。升湖区法院向张成功送达了起诉状副本。7月18日,张成功向升湖区法院提交了答辩状,未对案件的管辖权提出异议。8月2日,张成功向升湖区法院提出管辖权异议申请,称其与黎明丽已
甲、乙两公司共同出资设立丙公司,经双方协商,丙公司的总经理由甲方委派,董事长由乙方委派,甲方的出资比例为20%,乙方的出资比例为80%,股东按出资比例行使表决权。在核算甲、乙两方长期股权投资时,()核算。
下列选项中,属于注册建造师应当履行的义务包括()。
企业对应付的商业承兑汇票,如果到期不能足额付款,在会计处理上应将其转作()。
试述孔雀帝国的各项制度。
ROME,Dec15th—Anewcomputer-aidedreportfromtheconservationistEarthClubindicatesthatwithoutmajorpolicychangesasev
Lastmonth,thepublicaddresssystematEarl’sCourtsubwaystationinLondonwasorderedtogetthenoisedown.Passengers,it
WebChatToday,we’lltalkaboutanewwayofcommunicationonline-webchat.I.Participantsinchatsessionsa.inthepast:(1
Sheistheonlyoneofthosegirlswho______willingtodothatvoluntaryjob.
最新回复
(
0
)