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Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
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原句句子结构：Today's technology allows manufacturers to make ...
原句逻辑语义：现在的科技允许制造商做出比以往任何时候额生产历史更省油的小型汽车。
A.语义错误，现在科技制造现在省油的汽车；
B.语义错误同A；
C.正确；
D.their指代前面的汽车错误；
E.to make more fuel-efficient cars有歧义；
182529cowo
my two cents关于e,这里e选项确实改变了句子的原意，变成了生产了更多节能车，而不是生产更节能的车，但是a的原意并不就一定prevail。我觉得e的错误在now和什么parallel这里，比如说now than ever这里表述是对的，在这里应该是now than any time...,而不at any time...
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2022-08-07 22:45:59
小良冠二郎
D選項，做題要盡量避開有代詞的選項，因為這樣容易引起指代不清的錯誤（pronoun ambiguity）。而且more修飾fuel efficient比修飾fuel efficient small cars要更好。 比較後用they，則是表示同一批東西在比較（they是比較前面的主語的代詞），而用those則是不同一批在比較。
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2021-02-15 19:41:08
孙笑川258
核心语义是车与车的比较，c显然最明显
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2019-12-03 18:27:00
何闭关
很迷,这里的答案总是用指代不明来排除,Ron的视频里面经常强调pronoun ambiguity在多数问题里不是首要问题,还看过gmatclub上另一个老师说只在第二轮没办法的时候才看指代不明的问题. yeah. i don't think that pronoun ambiguity is the criterion here. the sentence is supposed to say that today's small cars are more fuel-efficient than previous small cars -- i.e., OTHER small cars. this is important, because you can't use a "they"/"their" construction (which would illogically imply that you're talking about the same small cars mentioned in the first part of the sentence). the use of "those" in (c), on the other hand, accomplishes this distinction nicely. analogy: sprinters in texas can run faster than they can in north dakota. --> illogical; in this sentence, "they" would be taken to mean "sprinters in texas" (i.e., not just sprinters). sprinters in texas can run faster than those in north dakota. --> makes sense; "those" = sprinters, in this case. same thing with "they/their" vs. "those" in these instances.
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2019-01-08 07:19:43
默默
they出现了太多次，再加上前面本来有manufactures，会混乱
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2018-04-26 13:51:47
Johnny97
文中出现了多个动词和名词，因此不能简单地做时间状语的比较，即now和at any other time的比较 a选项有使small cars变得更加节能的意思，歧义，且上面也说了，这种出现多个动词和名词的情况为了不产生歧义一般不做简单的时间状语比较 b选项中they完全指代，且少了any other，导致比较对象出错（少了other把自己也包括进去了） c正确 de均有歧义，至于more到底是更多的汽车，还是更加节能，我们不得而知，而且也没有other
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2017-11-15 12:26:25
St7777回复Johnny97
Ok
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2018-12-08 11:46:10
Francis
○ A选项的问题是比较对象不是一类，比较对象是now和at any time，现代科技能使小车”在现在比在过去”省油，语义存在逻辑错误；today和Now重复；at any time没有将自身排除在外，应为any other time ○ B选项的问题也是比较对象不是一类，比较的是small cars和they were。另外they是指上文提及的东西，放在这里变成谈及的small cars和这些cars在历史上的比较，显然语义也不正确 ○ D选项的问题是their的指代不清楚，their可以指的是前面的cars也可以是manufacturers ○ E选项的问题是比较对象不是一类，比较的是small cars和 time in history；另外前面的more+adj+daj有歧义，到底是更多的车，而这些车是经济省油的还是更经济省油的小车？
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2016-05-21 15:06:25
晔晔回复Francis
+1
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2017-12-09 11:00:26
St7777回复Francis
了解了a
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2018-12-08 11:47:10
BJ-LDY
A.比较对象为small cars和in their history不可比；
B.they指代前面提到的相同的事物，但实际上比的是同类不同物，逻辑错误，且they were和small cars不可比；
C.对，比较对象可比；
D.their指代不清，可能指代manufacturer或者cars；
E.small cars和at any time不可比
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2015-11-19 20:19:52
pro要上7
any time 与any other time 相比肯定使用后者，表示不包括现在，所以在cd里面选
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2015-09-23 13:18:55
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