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
42
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
InBritainandmanyothercountriesappraisalisnowatoolofmanagement.
TheWorker’sRoleinManagementTraditionally,ithasbeentheworkers’roletoworkandmanagement’sroletomanage.Mana
OldandActiveItiswell-knownthatlifeexpectancyislongerinJapanthaninmostothercountries.A【C1】______reportals
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
EatingPotatoesGivesYourImmuneSystemaBoostEatingpotatoesisnotonlygoodforbowelhealth,butalsoforthewholei
随机试题
当发现理想与现实的矛盾时,不加分析地全盘认同当下的现实,或对理想失去信心和热情,说什么“告别理想”“躲避崇高”。这种认识上的误区属于()
女性,49岁,多年胃溃疡病,近1个月胃区疼痛,发病前饱食并饮酒,饭后12分钟突然腹痛,剧如刀割,腹呈板状,来院急诊。下一步简单有效的检查方法是
可交换公司债券一旦发售,股东就不得再行赎回。( )
根据“了解客户”原则,客户由他人代理办理业务的,银行只需对代理人的身份证明文件进行核对并登记。()
权利质权的种类不包括()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
从身势来说,讲话时动作少的是()。
随机变量X与Y相互独立,且都在[0,1]上服从均匀分布,试求:(Ⅰ)U=XY的概率密度fU(u);(Ⅱ)V=|X—Y|的概率密度fV(v).
把表中“学历”字段的有效性规则取消,正确的SQL语句是()。
SomePeopleDoNotTasteSaltLikeOthersLow-saltfoodsmaybeharderforsomepeopletolikethanothers,accordingtoas
最新回复
(
0
)