ChaseDream
搜索
返回列表 发新帖
查看: 1005|回复: 0
打印 上一主题 下一主题

文勇上的一道题,大家帮我看看吧~

[复制链接]
跳转到指定楼层
楼主
发表于 2009-11-12 14:44:18 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
Paragraph 4: As he collected fossils from strata throughout England, Smith began to see
that the fossils told a different story from the rocks Particularly in the younger strata the rocks
were often so similar that he had trouble distinguishing the strata, but he never had trouble
telling the fossils apart.While rock between two consistent strata might in one place be shale
and in another sandstone, the fossils in that shale or sandstone were always the same.Some
fossils endured through so many millions of years that they appear In many strata,but others
occur only in a few strata, and a few species had their births and extinctions within one
particular stratum.Fossils are thus identifying markers for particular periods in Earth's
history.
8.According to paragraph 4,it was difficult for Smith to distinguish rock strata because
A.the rocks from different strata closely resembled each other
B.he was often unable to find fossils in the younger rock strata
C.their similarity to each other made it difficult for him to distinguish one rock type from
another
D.the type of rock between two consistent strata was always the same
请问C和D有什么区别啊,我觉得都差不多啊!!!
收藏收藏 收藏收藏
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: TOEFL / IELTS

正在浏览此版块的会员 ()

手机版|ChaseDream|GMT+8, 2025-7-26 16:21
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2025 ChaseDream.com. All Rights Reserved.

返回顶部