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
60
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,
InBritainandmanyothercountriesappraisalisnowatoolofmanagement.
TheWorker’sRoleinManagementTraditionally,ithasbeentheworkers’roletoworkandmanagement’sroletomanage.Mana
OldandActiveItiswell-knownthatlifeexpectancyislongerinJapanthaninmostothercountries.A【C1】______reportals
OldandActiveItiswell-knownthatlifeexpectancyislongerinJapanthaninmostothercountries.A【C1】______reportals
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
随机试题
李某和邓某在一年内共盗割20公里长的公用通信电缆,变卖后得款16000余元。二人的盗割行为导致某通信干线中断十余次。对于李某、邓某的行为定性,下列哪一选项是正确的?()
下列不属于银行借款信用条件的是()
设u=u(x),v=v(x)是可微的函数,则有d(uv)=
患者,男,左手拇、示、中指掌侧外伤3天,发热,血WBC9.6×109L,中性0.78。体检:左拇、示、中指创面有脓性分泌物,拇指呈外展状,不能对掌,示指呈半屈状,活动受限,中指可被动活动,掌心有轻度凹陷,手背及大鱼际和拇指指蹼明显肿胀,并有压痛。此时做
关于共价修饰的叙述错误的是
A.氢氯噻嗪B.呋塞米C.螺内酯D.乙酰唑胺E.甘露醇抑制髓袢升支粗段的Na+一K+一2C1一同向转运系统的药物是()。
工程量清单为投标者提供公开、公平、公正的竞争环境,由______统一提供。
夏日雷雨过后,人们会感到空气特别清新。其主要原因是()。
在一只底面半径是20cm的圆柱形小桶里,有一半径为10cm的圆柱形钢材浸没在水中,当钢材从桶中取出后,桶里的水下降了3cm。求这段钢材的长度。
请分析和评价下面这段话:“新媒介并不是自发地和独立地产生的——它们从旧媒介的形态变化中逐渐产生。当比较新的媒介形式出现时,比较旧的形式通常不会死亡,它们会继续演进和适应。”(罗杰.菲德勒:《媒介形态变化:认识新媒介》,北京:华夏出版社,2000年)(中国传
最新回复
(
0
)