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 Natural Balance Being Altered The balance of nature is a very elaborate and delicate system of check and countercheck. I
The Natural Balance Being Altered The balance of nature is a very elaborate and delicate system of check and countercheck. I
admin
2013-05-28
76
问题
The Natural Balance Being Altered
The balance of nature is a very elaborate and delicate system of check and countercheck. It is continually being altered as climates change, as new organisms evolve, as animals or plants spread to new areas. But the alterations have in the past, for the most part, been slow whereas with the arrival of civilized man, their speed has been multiplied much: from the evolutionary time-scale where change is measured by periods of ten or a hundred thousand years, they have been transferred to the human time-scale in which centuries and even decades count.
Everywhere man is altering the balance of nature. He is facilitating the spread of plants and animals into new regions. Sometimes deliberately, sometimes unconsciously. He is covering huge areas with new kinds of plants, or with houses, factories, slagheaps and other products of his civilization. He gets rid of some species on a large scale, but favors the multiplication of others. In brief, he has done more in five thousand years to alter the biological aspect of the planet than has nature in five million years.
Many of these changes which he has brought about have had unforeseen consequences. Who would have thought that the throwing away of a piece of Canadian waterweed would have caused half the waterways of Britain to be blocked for a decade? Or that provision of pot cacti for lonely settlers’ wives would have led to Eastern Australia being covered with forests of prickly pears?
Who would have predicted that the cutting down of forests on the Adriatic coast, or in parts of Central Africa, could have reduced the land to a semi-desert with the very soil washed away from the bare rock? Who would have thought that improved communications would have changed history by the spreading of disease-sleeping sickness into East Africa, measles into Ocean, AIDS around the whole world?
These are spectacular examples, but examples on a smaller scale are everywhere to be found. We made a nature sanctuary for rare birds, providing absolute security for al1 species; and we may find that some common and hardy kind of birds multiplies beyond measure and drive away the rare kinds in which we are particularly interested. We see, owing to some little change brought about)by civilization, the starting spread over the English countryside in hordes. We improve the yielding capacities of our cattle; and find that how they exhaust the pastures which were sufficient for less demanding stock. We gaily set about killing the carnivores that disturb our domestic animals, the hawks that eat our fowls and game-birds; and find that in so doing we are also removing the brake that restrains the multiplication of mice and other little rodents that gnaw away the farmers’ profits.
This passage can best be characterized as______.
选项
A、a reminiscence of times past
B、a thoughtful essay on nature’s laws
C、a lament that so many species vanished
D、an objective discussion of civilization
答案
B
解析
作者在文中论述的中心就是人类通过自身的活动打破了自然平衡,为自己带来了严重后果,所以我们可以说本文是一篇关于自然法则的富有思想的文章。A“对过去的回想”,D“关于文明的客观讨论”不是本文主要内容。作者提到了大量物种的消失,但从文中并看不出作者在“哀悼”,所以C“为许多消失的物种哀悼”不合适。
转载请注明原文地址:https://kaotiyun.com/show/biQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
Someabnormalhumanbehaviormaybecausedbyeatingsubstancesthatupsetdelicatechemicalbalancesinthebrain,
Evenwithdetailedknowledgeaboutanarea,geologistscannoteasilylocatestoresofundergroundnaturalgas.
OldandActiveItiswell-knownthatlifeexpectancyislongerinJapanthaninmostothercountries.A【C1】______reportals
OldandActiveItiswell-knownthatlifeexpectancyislongerinJapanthaninmostothercountries.A【C1】______reportals
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
随机试题
有利原则必须满足的条件,不包括
期末结存量如同蓄水池,当本期产品供大于求时,期末结存量增加;当供不应求时,期末结存量减少。()
2013年一季度,社会融资规模为6.16万亿元,比上年同期激增2.27万亿元。其中,当季人民币贷款增加2.76万亿元,人民币贷款占同期社会融资规模的44.7%,同比大幅降低了18.6个百分点。一季度,委托贷款占同期社会融资规模的8.5%,同比高1
下列哪些行为应以职务侵占罪论处?()(2008/2/63)
患儿,女性,5岁。出生后体弱。易生病感冒。查体:胸骨左缘第3、4肋间可闻及粗糙的全收缩期杂音,传导范围广,有震颤。该患儿最可能的诊断是
某项目编制施工成本计划时,先将成本按分部分项工程进行了划分,又根据施工进度计划将各分部分项工程成本按月汇总进行编制,形成各月成本支出计划,这种编制方法属于()。
教育法规
①在基因时代,生物学家们收集分子层次上的癌症成因信息,这些信息使他们开始质疑传统的癌症分类法:即根据肿瘤出现在身体中的位置来分类癌症。②研究者们认识到传统的分类法应该被根据突变种类的分类法取代,正是这些突变使得细胞以不受控制的形式生长而形成肿瘤。
某发展中国家所面临的问题是,要维持它的经济发展,必须不断加强国内企业的竞争力;要保持社会稳定,必须不断建立健全养老、医疗、失业等社会保障体系。而要建立健全社会保障体系,则需要企业每年为职工缴纳一定比例的社会保险费。如果企业每年为职工缴纳这样比例的社会保险费
在数据库中,数据的正确性、合理性及相容性(一致性)称为数据的______。
最新回复
(
0
)