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
Public opinion is still largely unaware of or indifferent to the need to preserve rare species, whether for cultural or for scie
Public opinion is still largely unaware of or indifferent to the need to preserve rare species, whether for cultural or for scie
admin
2010-07-14
42
问题
Public opinion is still largely unaware of or indifferent to the need to preserve rare species, whether for cultural or for scientific reasons. Some people indeed are actively hostile. Species have been dying out since life began, they argue, and have continuously been replaced by new species. Why, therefore, should we interfere with the process? Let us abandon to their fate the great Indian rhinoceros, the Arabian ostrich, the Tasmanian wolf, and all those other animals that cannot adapt themselves to the modern world. Others will arise to take their place.
But, of course, this argument has got its time-scale all wrong, It would take millions of years to evolve a set of new species to replace those we are now losing. In the meantime the world is filling up with the hardy and adaptable pests, rats and rabbits, starlings and house sparrows. The cultural argument for preserving wild life, that it is part of our natural heritage, argues itself, except to those who are blind to cultural values anyway, what is less obvious and more in need of explanation is the scientific case for preventing the extirpation of rare species.
In these days of torrential achievement in the physical sciences we are apt to forget that it is possible only because most of the basic thinking in the sciences has already been done. The seed has been sown and the fruit is now being harvested. Could that basic thinking have been brought to so triumphant a conclusion so early if the raw material, the fundamental physical phenomena, had been subjected to the sort of erosion and extinction that today constantly threatens the raw material of the biological sciences? Supposing the world stock of radium had gone the way of the dodo and the great auk by 1850. Who at that early date could have put up a sound argument in favor of conserving it if it had been known and in danger of destruction?
It is just this danger which now confronts the biological sciences, whose basic thinking is by no means yet done, but which hold the key to man’s achievement of a satisfactory mastery over both his nature and his nurture in the coming centuries. Animal and plants species are natural experiments in genetics and adaptation to environment that have taken millions of years to work out. Research as we may with fruit-flies, we can never catch up with nature. We have not the time. Is it not therefore folly to allow our vital experimental material to vanish through carelessness?
The raw material of the biological sciences has been subjected to ______.
选项
答案
erosion and extinction
解析
文章末段提到生物学正面对这样的危险(It is just this danger which now confronts the biological sciences),指示代词“this”回指到上一段。上一段中“threaten”点出了危险所在:“threaten”所在的定语从句的先行词就是答案。答题时一定要删掉“the sort of”,不然就文不对题了。这题有相当难度。
转载请注明原文地址:https://kaotiyun.com/show/DpKK777K
0
大学英语六级
相关试题推荐
Theplaceofthechildinsocietyhasvariedforthousandsofyearsandhasbeeneffectedbydifferentculturesandreligions,
Scientistshaveknownsince1952thatDNAisthebasicstuffofheredity.They’veknownitschemicalstructuresince1953.They
SinceIboughtacomputerlastmonth,anewworldhasopenedupbeforeme,aworldthatreachesfarbeyondmyimmediatesurroun
Manytheoriesconcerningthecausesofjuveniledelinquencyfocuseitherontheindividualoronsocietyasthemajorcontributi
Manytheoriesconcerningthecausesofjuveniledelinquencyfocuseitherontheindividualoronsocietyasthemajorcontributi
THEPARTYGENEStevenBennerjokinglycallshimselfadilettante(业余艺术好爱者).AbiochemistattheUniversityofFloridainGai
A、Becauseyougetthehabitofstayinguplate.B、Becauseyouhaven’ttakensleepingpills.C、Becauseyousleepforhoursafter
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantininterpersonalcommunicationis
A、Ithasbrokendownbefore.B、Shegenerallydoesn’tallowpeopletoborrowit.C、Sheistryingtosellit,D、Sheboughtitfrom
A、Enoughfoodforaweek.B、Asleepingbagandaraincoat.C、Hikingbootsandbathingsuit.D、Acampingtent.C从选项中可推知,问题可能问的是外
随机试题
被评估企业持有A企业发行的债券30000元,发行期为4年,到期一次还本付息,年利率为15%。评估时债券的购入时间已满2年,当年的国库券利率为10%。评估人员通过对A企业的调查,认为该债券风险不大,考虑按2%作为风险报酬率。要求:分别以单利和复利计算方式计算
关于急性心肌梗死的指标乳酸脱氢酶的描述不正确的是
口腔白斑分型如下,除外()。
根据《混凝土面板堆石坝施工规范》(DL/T5128-2001),混凝土面板堆石坝坝料碾压宜采用羊脚碾,其工作重量不小于()。
计算速动资产时,需要扣除的资产项目是()。
《消费税暂行条例》规定,实行从价定率征税的应税消费品,其计税依据是含消费税而不含增值税的销售额。()
招用未满16周岁的未成年人从事危险作业的,由()部门责令改正,处以罚款。
提起行政复议的申请人是()。
ReadthefollowingextractfromanarticleaboutSecurityMarkets.Foreachquestion15—20,markoneletter(A,B.C,orD)onyou
Readthearticlebelowaboutahealthproblemthatkeyboardusersoftenhave.ChoosethecorrectwordtofilleachgapfromA,B
最新回复
(
0
)