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【OG20-P799-834题】
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.
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题目讨论 (10条评论)

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221264lpy
the genetic homogeneity evident in the world's people is the result of a "population bottleneck" -- that .... B that部分做population bottleneck的同位语 解释其内容 A reduce无法和主语our ancestors保持一致 是event减少人口 而不是ancestor C so that表示目的 “为了”的语义不对 从句中也无法和thus our genetic variation构成并列 D from歧义 reduce from是从多少减少 E so as to表示目的 语义不对
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0 回复 2022-05-28 19:29:19
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453805wxo
这个句子服从这样的结构:anthropologists believe that X---(in other words)that Y X和Y是一个平行结构。 同时使用排除法显然ACDE选项有明显的表达上的缺陷,
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0 回复 2022-03-19 12:18:37
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275476gao回复 453805wxo
经典的说了等于没说,考场上你不一定用得来。
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0 回复 2022-04-30 17:56:25
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168166gsbq
A有歧义,是这一事件减少了人口数量,A修饰位置可以解释成people reducing数量
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0 回复 2022-03-13 10:15:59
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麻辣小荔枝
CD 比较好排除,主要是 numbers 和 variation 的平行就可以了,E 选项句子结构明显混乱也可以不用考虑,主要在于 A 和 B,对于这两个选项私以为, 第一,波折号后边必然可以加句子,和分号作用相同。但是也可以不加,接名词性从句等修饰成分做解释说明,如本题。 第二,B 选项的 that 从句不是和前面的从句平行,而是作为 event 的同位语,解释了bottleneck。 第三,A和 B 的差别在于reduing 修饰了 suffer 还是 event 本身,从语义上讲,应该是 even 的本身减少了numbers 而不是 suffer 这件事请导致的结果
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0 回复 2022-01-12 18:57:03
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465414xzt
神nm破折号不能连接两个完整的句子,hp
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0 回复 2022-01-06 14:52:25
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唐多令
定从强调具体时间、具体动作以及动作一致性;分词强调不确定时间、抽象客观以及多次的行为。
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0 回复 2021-12-22 19:22:09
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216505pr
破折号不能连接两个完整句子,加了that以后,破折号后的句子成为前一个句子的同位语,起到解释说明的作用。所以AD都可以排除;C,and thus our genetic variation没有可以平行的东西,排除;E,同C;选B
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1 回复 2021-11-26 14:28:09
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向北歌
Some anthropologists believe that the genetic homogeneity evident in the world’s people is the result of a “population bottleneck”—that at some time in the past our ancestors suffered an event that greatly reduced their numbers and thus our genetic variation.
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0 回复 2021-11-07 23:27:26
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冲他丫的
题目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.
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0 回复 2021-10-26 21:36:22
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冲他丫的回复冲他丫的
A:svo,doing doing修饰v 不合逻辑 C:So that不能构成结果状语,导致thus后面没有谓语 D:sb suffered an event from sth and thus sth导致thus后面没有谓语 E:逗号后面不接that引导的非限定从。
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0 回复 2021-10-26 21:43:58
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吃着香蕉开跑车
选B
注意句子主干是anthropologists believe that... that ...,其中分号后面造成reducing的是一件事件,不是祖先去减少人数。
A:suffered和reduced不平行,是谁reducing也没有说清楚,主语anthropologists believe that,后面没有解释好相信的是啥。项的分词从句出现在这么靠后的地方,到底是定语从句——修饰the event, 即 the event reduced their numbers呢? 还是状语从句修饰主句主谓——修饰our ancestors suffered, 即 (when) our ancestors reduced their(ancestors') numbers, our ancestors suffered an event. 这叫状语从句省略修辞,省略引导词和相同主语,因此reducing的发起者默认是ancestors。不读句意,也可以确定A选项存在修饰级别错误的嫌疑。不优选
C:and前面的逗号和后面你句子意思无法并列。So that不能构成结果状语,导致thus后面没有谓语
D:还原their numbers were greatly reduced from an event,导致thus后面没有谓语
E:逗号后面不接that引导的非限定从。
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0 回复 2021-05-08 15:28:23