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阅读 > 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阅读题目解析:水中的死亡区域

2017-09-04 14:25:27来源：网络

　　【GRE阅读题目解析:水中的死亡区域】GRE考试考什么？GRE阅读是重点。新东方在线GRE频道为大家带来GRE阅读题目解析:水中的死亡区域，答案见下一页，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!

　　查看全部：GRE阅读答案解析(汇总)

　　GRE阅读题目解析:水中的死亡区域

　　P21

　　There have long been dead zones—water too low in oxygen to sustain most forms of life—in the Gulf of Mexico, which receives the waters of the Mississippi River. Scientists studied sediment cores from areas where the gulf’s most recent dead zone occurred. The scientists dated the sediment and counted species of foraminifera (marine protozoans) in the sediment; these species thrive in low-oxygen waters. As far back as 1823, the foraminifera thrived especially during Mississippi River flood years (during which nutrients levels increase), suggesting that nutrients in floodwaters can trigger low-oxygen water. The foraminifera in the core samples were most abundant after 1950, when farmers began using some fertilizer, which is rich in nutrients. Researchers believe that increased use of fertilizer leads to more-extreme dead zones.

　　1. Which of the following best describes the function of the highlighted sentence in the context of the passage as a whole?

　　A. It reconciles two opposing theories that were discussed earlier in the passage.

　　B. It suggests what the initial impetus was for the studies mentioned earlier in the passage.

　　C. It undermines a hypothesis that was presented in the preceding sentence.

　　D. It describes a problem with the methodology of the studies discussed in the passage.

　　E. It provides evidence supporting the belief mentioned in the final sentence of the passage.

　　Consider each of the choices separately and select all that apply.

　　2. It can be inferred from the passage that the “researchers” would agree with which of the following statements about the use of fertilizer?

　　A. If farmers near the Mississippi River decreased the amount of fertilizer that they used, the severity of the dead zones could be diminished.

　　B. If farmers near the Mississippi River continue their dependence upon fertilizers, foraminifera population will eventually decline.

　　C. If farmers near the Mississippi River stopped using fertilizers altogether, there would no longer be dead zones.

　　点击下一页查看答案：

本文关键字: GRE阅读题目 GRE阅读答案

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
GRE录播课（全科班/单项班） GMAT6-8人直播VIP小班 托福直播精讲班（30天/60天）
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