ChaseDream
搜索
返回列表 发新帖
00:00:00

In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles. Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow.

Which of the following, if true, most helps to explain the surprising finding?

正确答案: E

更多相关帖子

524

帖子

15

好友

4712

积分

ChaseDream

注册时间
2003-03-17
精华
8
解析
查看: 2597|回复: 4
打印 上一主题 下一主题

GMAT-22-33请教求解思路

[复制链接]
楼主
发表于 2005-11-11 14:26:00 | 只看该作者

GMAT-22-33请教求解思路



























In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand.  Such burrowing discourages barnacles from clinging to their shells.  When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles.  Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow.

Which of the following, if true, most helps to explain the surprising finding?











Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.





Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.





The strength of the tidal currents in a given location varies widely over the course of a day.





A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food.





Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.
沙发
发表于 2005-11-11 16:08:00 | 只看该作者
E
板凳
发表于 2005-11-12 04:38:00 | 只看该作者

该题为EXPLAIN.


前提:年轻的蟹挖洞,成年的时候不挖,所以有大量的BARNACLE


现象:年轻的蟹不挖洞,却没有BARNACLE


我的第一反应是年轻的蟹吸引不了BARNACLE,看了答案,只有E说蟹长大了换壳,所以选E

地板
 楼主| 发表于 2005-11-12 15:41:00 | 只看该作者
还是不太理解啊?
5#
发表于 2005-11-12 23:16:00 | 只看该作者

如果潮汐弱的话,蟹壳上会有很多B,但是现在的现实就是没有想象中那么多B, 因为中间曾经换了几次壳,每次换壳就把爬满B的壳换掉了,新长出来的是没有B的,所以现在看到的成年蟹上面没有很多B,因为新洗好澡新换好衣服,当然身上没多少虱子跳蚤什么的.

返回列表 发新帖
您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

所属分类: GMAT考试

IESE MBA
近期活动

正在浏览此版块的会员 ()

手机版|ChaseDream|GMT+8, 2024-12-23 19:20
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2023 ChaseDream.com. All Rights Reserved.

返回顶部