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 balance of nature is a very elaborate and delicate system of check and countercheck. It is continually being altered as clim
The balance of nature is a very elaborate and delicate system of check and countercheck. It is continually being altered as clim
admin
2011-01-04
21
问题
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, slag heaps 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 all 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.
So far as the alterations of the balance of nature are concerned, man_____.
选项
A、is somewhat more responsible than nature itself
B、plays a much greater role than nature itself
C、has done more than nature in recent years
D、is more likely to blame than nature
答案
B
解析
事实细节题,文章第二段最后一句提到,“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.”表明在对自然平衡的改变方面,人类比自然界所起的作用要大,即B项中的内容。通过这句话同样可以判断出A、C、D不正确。A中不应是somewhat,C中不应有“in recent years”,D中不应是likely,而是确实如此。
转载请注明原文地址:https://kaotiyun.com/show/5SHO777K
0
在职攻硕英语联考
相关试题推荐
Themayorwasaskedto______hisspeechinordertoallowhisaudiencetoraisequestions.(北京航空航天大学2015年试题)
(四川大学2010年试题)Youprobablyknowthatit’sbetterforbothyouandtheenvironmentifyoubuyanorganictomatoinsteadofon
(四川大学2010年试题)Youprobablyknowthatit’sbetterforbothyouandtheenvironmentifyoubuyanorganictomatoinsteadofon
Thenewsthatthecompanyisbeingtakenoverbyforeigninvestorshasseverely______thestockmarkets.(复旦大学2010年试题)
(北京航空航天大学2015年试题)Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebeliev
Aperson’shomeisasmuchareflectionofhispersonalityastheclotheshewears,thefoodheeatsandthefriendswithwhomh
______wecontinuetoworkhard,wecanfinishthetaskaheadofschedule.
Historically,thespread,prevalence,andveryexistenceofcontagiousdiseasehavewhollydependedonthegrowthandconcentrat
Plagiarismiswidelyrecognizedasahighcrimeagainsttheprojectofscience,buttheexplanationsforwhyit’sharmfulgenera
InanarticlesomeChinesescholarsaredescribedasbeing"tantalizedbythemysteriousdragonbonehieroglyphics."Tantalized
随机试题
Youshould______yourselves______thenewconditions.
卡托普利的降压作用机制为:
膀胱癌的血尿特点
甲公司委托向某办理房屋租赁业务,向某在办理过程中垫付了相关费用,后甲公司发觉向某所租赁的房屋与公司的需要有差距,主张解除合同而发生纠纷。下列表述正确的是:()
总资产周转率的大小主要取决于()。
______是在一国借助货币汇率下调、相对改变进出口商品价格从而改善贸易收支之前,会存在一个时滞,而且在这期间,贸易收支状况还有一段继续恶化的过程。
进入小肠的消化液有胰液、胆汁和肠液。()
Aftertenyearsofconflict,thetwocountries________diplomaticconnectionagain.
一个民族需要民族精神,一个时代需要时代精神,创业精神应当成为我们的民族精神,成为我们的时代精神,精神可以变物质,物质可以变精神,两个文明建设互相依存,互相促进。这段文字表达的最主要的意思是()。
A、Hisfatherpulledhimoutintime.B、Helefttheareabeforetheearthquake.C、Hestayedinanicebox.D、Theirhouseescapedt
最新回复
(
0
)