QQ登录
微博登录 
托福培训
托福考试动态
2017-03-24 11:05
来源：新东方
作者：上海新东方
after valuable mineral deposits are discovered， the population of a geographic region booms then levels off an d begins to decrease at a slow and steady race.
the variety of styles stocked by a shoe store increases rapidly after the store opens， holds constant for many months， and then gradually creeps upward.
9. the author suggests which one of the following about the cretaceous crisis?
it was the second most devastating extinction episode in history.
it was the most devastating extinction episode up un until that time.
it was less devastating to species diversity than is the current biodiversity crisis.
the rate of extinction among marine animal species as a result of the crisis did not approach 77 percent.
(e) the dinosaurs comprised the great majority of species that perished during the crisis.
10. the author mentions the nile perch in order to provide an example of
(a) a species that has become extinct through human activity
(b) the typical lack of foresight that has led to biogeographic disaster
(c) a marine animal species that survived the permian extinctions
(d) a species that is a potential source of material wealth
(e) the kind of action that is necessary to reverse the decline in species diversity
11. all of the following are explicitly mentioned in the passage as contributing to the extinction of species except
(a) hunting
(b) pollution
(c) deforestation
(d) the growth of human populations
(e) human-engineered changes in the environment
12. the passage suggests which one of the following about material and cultural wealth?
属于信息题(中可定位的)
because we can readily assess the value of material and cultural wealth， we tend not to take them for granted.
just as the biota is a source of potential material wealth， it is an untapped source of cultural wealth as well.
some degree of material and cultural wealth may have to be sacrificed if we are to protect our biological heritage.
material and cultural wealth are of less value than biological wealth because they have evolve over a shorter period of time.
material wealth and biological wealth are interdependent in a way that material wealth and cultural wealth are not.
13. the author would be most likely to agree with which one of the following statements about the consequences of the biodiversity crisis?
the loss of species diversity will have as immediate an impact on the material of nations as on their biological wealth.
the crisis will likely end the hegemony of the human race and bring about the ascendancy of another species.
the effects of the loss of species diversity will be dire， but we cannot yet tell how dire.
it is more fruitful to discuss the consequences of the crisis in terms of the potential loss to humanity than in strictly biological loss to humanity than in strictly biological terms.
the consequences of the crisis can be minimized， but the pace of extinctions can not be reversed.
推荐阅读
扫码添加大队长Sam，领取最新沪上热门国际学校招生信息
A BETTER YOU,A BIGGER WORLD!
版权及免责声明
①凡本网注明"稿件来源：新东方"的所有文字、图片和音视频稿件，版权均属新东方教育科技集团（含本网和新东方网） 所有，任何媒体、网站或个人未经本网协议授权不得转载、链接、转贴或以其他任何方式复制、发表。已经本网协议授权的媒体、网站，在下载使用时必须注明"稿件来源：新东方"，违者本网将依法追究法律责任。
② 本网未注明"稿件来源：新东方"的文/图等稿件均为转载稿，本网转载仅基于传递更多信息之目的，并不意味着赞同转载稿的观点或证实其内容的真实性。如其他媒体、网站或个人从本网下载使用，必须保留本网注明的"稿件来源"，并自负版权等法律责任。如擅自篡改为"稿件来源：新东方"，本网将依法追究法律责任。
③ 如本网转载稿涉及版权等问题，请作者见稿后在两周内速来电与新东方网联系，电话：010-60908555。
托福培训
托福考试动态
