搜索图标
搜索

热门搜索:如何备考GRE GRE填空 GRE数学机经 GRE模考

经典真题320篇 -6092【medium】 00:00:00 关闭计时
收藏
纠错

One explanation for the tendency of animals to be more vigilant in smaller groups than in larger ones assumes that the vigilant behavior—looking up, for example—is aimed at predators. If individuals on the edge of a group are more vigilant because they are at greater risk of being captured, then individuals on average would have to be more vigilant in smaller groups, because the animals on the periphery of a group form a greater proportion of the whole group as the size of the group diminishes.

However, a different explanation is necessary in cases where the vigilant behavior is not directed at predators. J. Krebs has discovered that great blue herons look up more often when in smaller flocks than when in larger ones, solely as a consequence of poor feeding conditions. Krebs hypothesizes that the herons in smaller flocks are watching for herons that they might follow to better feeding pools, which usually attract larger numbers of the birds.

It can be inferred from the passage that the author of the passage would be most likely to agree with which of the following assertions about vigilant behavior?

正确答案: D 耗时:
该题平均耗时:1分50秒 ,平均正确率:84 %,难度系数:2 。 该题由网友lgw19070提供。更多GRE题目请 点击上传

做题笔记

网友解析

我有更好的解析

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~)

Tianiuer

However, a different explanation is necessary in cases where the vigilant behavior is not directed at predators. 推出D选项
1楼  | 2021-02-22 14:44:01 回复
最新更新题库
雷哥网GRE微信

微信公众号:greonline

报告题目错误
请选择错误类型:
请描述一下这个错误:

取消
GRE培训

高效提分,预见你想象的高分!

2020 gre.viplgw.cn All Rights Reserved 川公网安备 51010402001157号 蜀ICP备20012245号-5 免责声明
雷哥网GRE(gre.viplgw.cn),GRE培训|GRE考试|GRE在线课程|GRE网课|GRE机经真题_雷哥网GRE培训官网。本网站提供的OG&150真题&真题内容,其版权均为ETS所有,Please reference the OG。本网站中所提供的magoosh、Kaplan、princeton、NO、CQ、CHP、猴哥等题目内容来源互联网网友,仅供学习者交流免费使用。本网站所提供的知识库内容,部分来源于雷哥网GRE整理发布,版权归gre.viplgw.cn所有,部分来源于互联网,版权归原作者所有,本网站内容仅供学习者交流免费使用。