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Gmat97.Someanthropologistsbelievethatthegenetichomogeneityevidentintheworld’speopleistheresultofa“populationbottleneck”—atsometimeinthepastourancestorssufferedanevent,greatlyreducingtheirnumbersandthusourgene
更新时间: 2025-08-26 20:44:48
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问题描述:

Gmat

97.Someanthropologistsbelievethatthegenetichomogeneityevidentintheworld’speopleistheresultofa“populationbottleneck”—atsometimeinthepastourancestorssufferedanevent,greatlyreducingtheirnumbersandthusourgeneticvariation.

(A)atsometimeinthepastourancestorssufferedanevent,greatlyreducingtheirnumbers

(B)thatatsometimeinthepastourancestorssufferedaneventthatgreatlyreducedtheirnumbers

(C)thatsometimeinthepastourancestorssufferedaneventsothattheirnumbersweregreatlyreduced,

(D)sometimeinthepastourancestorssufferedaneventfromwhichtheirnumbersweregreatlyreduced

(E)sometimeinthepast,thatourancestorssufferedaneventsoastoreducetheirnumbersgreatly,

为什么选B?

李子良回答:
  (A)错同位语从句that不能省略   (B)thatatsometimeinthepastourancestorssufferedaneventthatgreatlyreducedtheirnumbers正确   (C)thatsometimeinthepastourancestorssufferedaneventsothattheirnumbersweregreatlyreduced,错根据前句anevent后应该是定语从句   (D)sometimeinthepastourancestorssufferedaneventfromwhichtheirnumbersweregreatlyreduced错同位语从句that不能省略   (E)sometimeinthepast,thatourancestorssufferedaneventsoastoreducetheirnumbersgreatly,错soastoreduce是目的状语与句子意思不符
时文飞回答:
  你的意思是破折号后面跟的是同位语从句?是只有这个题是这样,还是破折号后面都是同位语从句?
李子良回答:
  破折号后面所给选项是同位语从句
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