Help

  • 右上角的时钟图标会对每道题和所有题计时
  • 右上角的文件夹点击可以打开和关闭当前题号
  • 点击右上角的星星图标 ,所有被收藏的题目均可在“我的”-“收藏”中找到
  • 点击右下角 Next进入下一题。注意:如果你没有做当前题目,你将不可以进入下一题
  • 点击左下角的 QuitEnd Exam 即可退出练习

Close

End Section Review

    你想结束这部分的检查吗?
    如果你点击Yes,你将结束该部分模考。
yes
no

End Exam

    You are about to end your exam

    If you click the Yes button below,your exam will end.
    Are you sure you want to end your exam?
yes
no

Answer Edit Confirmation

    你想更改这个问题的答案吗?
Yes,换答案
No,保留原始答案并回到问题上
注册 注册限时领GMAT/GRE全科PDF备考资料包

欢迎登陆~

验证码
登录
没有账号? 立即注册

欢迎加入~

验证码
注册
已有账号? 立即登录

找回密码~

验证码
提交
记起密码? 立即登录
提交 取消
最新题目

题目内容

收藏
纠错
Naturalist: The decline of coral reefs has various causes. One contributing factor is predation on coral by organisms such as the crown-of-thorns sea star, whose preferred food source is coral polyps. Human fishing practices have decreased the sea star’s predators, such as the harlequin shrimp. It is also possible that runoff containing nutrients for phytoplankton has resulted in larger phytoplankton blooms: the crown-of-thorns sea star gladly eats phytoplankton.Indicate which cause-and-effect sequence would most likely, according to the naturalist, result in coral reef decline. Make only two selections, one in each column.

Cause Effect
An increase in phytoplankton
An increase in phytoplankton
An increase in phytoplankton
A decrease in phytoplankton
A decrease in phytoplankton
A decrease in phytoplankton
An increase in crown-of-thorns sea stars
An increase in crown-of-thorns sea stars
An increase in crown-of-thorns sea stars
A decrease in crown-of-thorns sea stars
A decrease in crown-of-thorns sea stars
A decrease in crown-of-thorns sea stars
An increase in harlequin shrimp
An increase in harlequin shrimp
An increase in harlequin shrimp
正确答案: 1,3

参考解析

提交我的解析
    知识点概述
    因果逻辑关系,分析不同因素之间的因果联系以及如何最终导致珊瑚礁衰退。 解析
    1. 人类捕鱼活动减少了刺冠海星(crown - of - thorns sea star)的捕食者(如小丑虾),会使刺冠海星数量增加,即“人类捕鱼活动导致小丑虾减少”为因,“刺冠海星增加”为果。 2. 含有浮游植物营养物质的径流可能导致浮游植物大量繁殖,而刺冠海星喜欢吃浮游植物,浮游植物增加会为刺冠海星提供更多食物,从而使其数量增加,即“浮游植物增加”为因,“刺冠海星增加”为果。刺冠海星增加会因为捕食珊瑚而导致珊瑚礁衰退。所以Cause选“An increase in phytoplankton”,Effect选“An increase in crown - of - thorns sea stars” 。

题目讨论 (如果对题目有任何的疑惑,欢迎在这里提出来,大家会帮你解答的哦~)

还没有人评论,赶快抢个沙发~

报告题目错误 ×
请选择错误类型:
请描述一下这个错误:

取消
logo

mofa留学圈
一站式GMAT与GRE在线学习平台

公众号

关注mofa留学圈