课程咨询

GRE首页 GRE课程 GRE动态 0元讲座 GRE模考网站

新东方在线 > GRE > GRE报考指南 > 正文
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE考试内容之最新阅读题目(20170713)

2017-07-17 17:32:33来源：网络

　　新东方在线GRE频道为大家带来GRE考试内容之最新阅读题目(20170713)一文，本文是2017年7月15日GRE阅读考生回忆的部分内容，希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

　　2017年7月15日GRE阅读 中篇阅读：

　　Although many hypotheses have been proposed to explain why some plant communities are more susceptible than others to invasion by nonnative species, results from field studies have been inconsistent and no general theory of invasibility has yet emerged. However, a theory based on fluctuating resource availability could integrate most existing hypotheses and successfully resolve many of the apparently conflicting and ambiguous results of previous studies. The suggested theory is that a plant community becomes more susceptible to invasion whenever there is an increase in the amount of unused resources. [/br]The diversity in the range of resource-release mechanisms could partly explain the absence of consistent ecological correlates of invasibility. In particular, the theory predicts that there will be no necessary relationship between the species diversity of a plant community and its susceptibility to invasion, since near-complete exploitation can each occur in both species-rich and species-poor communities. Though Lonsdale found a positive association between species richness and invasion, this may arise from the tendency of diverse plant communities to be nutrient poor and therefore more responsive to the effects of human-caused influxes of nutrients.

　　1, The passage is primarily concerned with

　　A assessing the empirical success of a theory

　　B explaining why no consistent theoretical account of a phenomenon has been possible

　　C advocating a potential solution to a theoretical impasse

　　D deducing testable predictions from a proposed theory

　　E describing the difficulties involved in explaining certain empirical results

　　2, It can be inferred that the author would most likely agree with which of the following assessments of the results from field studies

　　A Many of the results contradicted predictions of susceptibility to invasion that are based on the availability of resources unused by the community.

　　B If fluctuating resource availability were taken into account, many of the apparent inconsistencies among the results could be explained.

　　C The apparent inconsistencies and ambiguities in the results are caused by trying to make them fit an inadequate general theory of invasibility.

　　D No general theory of invasibility has emerged because none of the studies has been able to assess the degree of an invasion accurately.

　　E The results tend to show a degree of susceptibility to invasion that is lower than would be expected given the prevalence in the wild of nonnative species.

　　3, According to the author, the theory based on fluctuating resource availability might resolve "apparently conflicting and ambiguous results” because

　　A It explains how a particular circumstance can produce disparate effects.

　　B It does not assume that all of the results are instances of the phenomenon that the theory is intended to explain.

　　C It predicts that seemingly minor variations in research methodology can have a dramatic effect on results.

　　D Its account is based on a statistical tendency rather than on the supposition that the results arise from a causal connection.

　　E It indicates why a similar outcome may be preceded by very different circumstances on different occasions.

本文关键字: GRE考试 GRE考试内容 GRE阅读题目

上一页 1 2 下一页

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
更多>>
更多惊喜>>

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多资料
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10