ChaseDream
搜索
返回列表 发新帖
00:00:00

Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck" -at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.

正确答案: B

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: 2325|回复: 2
打印 上一主题 下一主题

看了之前的帖子还是不明白,求指教!!!

[复制链接]
跳转到指定楼层
楼主
发表于 2016-9-10 09:20:46 | 只看该作者 回帖奖励 |正序浏览 |阅读模式
Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a “population bottleneck”-at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
A. at some time in the past our ancestors suffered an event, greatly reducing their numbersB.that at some time in the past our ancestors suffered an event that greatly reduced their numbers
C. that some time in the past our ancestors suffered an event so that their numbers were greatly reduced,
D. some time in the past our ancestors suffered an event from which their numbers were greatly reduced
E. some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,

有几个问题:1,破折号的用法,这里为什么一定要是人类学家believe that X-that Y中Y的内容,而不是对前面内容的解释说明?2,great reducing balabala为什么不能是our ancestors suffered an event的结果状语?comma,Ving不是既能表伴随状语又能表示结果状语吗?求大神指教!已晕。
收藏收藏 收藏收藏
板凳
 楼主| 发表于 2016-9-10 11:26:04 | 只看该作者
结果状语不是前面整句话所导致的结果吗?我理解的是“祖先遭受了重大事件”这整个一句话的内容导致了他们数量的减少,这么理解不对吗?大神指教!!
沙发
发表于 2016-9-10 11:17:16 | 只看该作者
并没有说一定要有that吧?破折号单纯表解释而已
reducing这里如果作结果状语怎么理解?ancestors reduced their numbers, 显然不是祖先导致自己数量减少或者ancestor suffered 减少number,而是这个event的发生导致number's reduction。 所以就算改也要用an event occured balabala to ancesters, reducing balabala
您需要登录后才可以回帖 登录 | 立即注册

IESE MBA
近期活动

正在浏览此版块的会员 ()

手机版|ChaseDream|GMT+8, 2024-11-28 20:30
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