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[Critical Reasoning]
试题详情
题目：
Birds have been said to be descended from certain birdlike dinosaur species with which they share distinctive structural features. The fossil record, however, shows that this cannot be so, since there are bird fossils that are much older than the earliest birdlike dinosaur fossils that have been found.
Which of the following is an assumption on which the argument relies?
Which of the following is an assumption on which the argument relies?
选项:
A、The birdlike dinosaurs have no living descendants.
B、There are no flightless dinosaur species that have the distinctive structural features shared by birds and birdlike dinosaurs.
C、There are no birdlike dinosaur fossils that are older than the bird fossils but have not yet been unearthed.
D、It could not have been the case that some birds were descended from one of the birdlike dinosaur species and other birds from another.
E、Birds cannot have been descended from dinosaur species with which the birds do not share the distinctive structural features.
答案:
C
提问：
原文是再说鸟不是一种像鸟的恐龙的后代，因为发现了鸟的化石比这恐龙还久远。我选了A 然后这恐龙也没现存的后代，加上鸟化石比恐龙老就能得出结论呀…… 答案C说没有这种像鸟的恐龙化石比鸟的化石久远，但是没发现。读前面都能支持，但是转折不就承认有了吗，只不过没发现，但是还是有呀。
解答：
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提问：
麻烦英吉老师解答！
从题目中我找到的逻辑链是
R：有比earlist birdlike dinosaur fossils更老的鸟bird fossils被找到了
C：不能说bird是从birdlike dinosaur中进化得来的
找到的Gap两个：
1、 有没有可能更老的birdlike dinosaur fossils没被找到，
2、 从化石到进化的因果关系不清楚
但其实我对我找的gap是不确定的，我就拿正确答案C来验证，但是我发现C是不是抬杠呢？因为原文说了birdlike dinosaur fossils已经是earlist的了，那就是结论已经定死了birdlike fossils是在最前面那个点，没有比这更早的了。C选项说没有老于bird fossils的birdlike fossils没被找到，那不也说明原来的birdlike fossils 是earlist的吗？这个earlist跟no older是否重复了呢？算不算重述了原文结论进而属于抬杠式选项呢？
解答：
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提问：
an assumption on which the argument relies 这类问题我就不太会 是在问支持么？这道题的题目读懂了 但是选不出答案 没明白答案与题目的逻辑关系
解答：
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阅读3365
提问：
原文是再说鸟不是一种像鸟的恐龙的后代，因为发现了鸟的化石比这恐龙还久远。我选了A 然后这恐龙也没现存的后代，加上鸟化石比恐龙老就能得出结论呀…… 答案C说没有这种像鸟的恐龙化石比鸟的化石久远，但是没发现。读前面都能支持，但是转折不就承认有了吗，只不过没发现，但是还是有呀。
解答：
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阅读3398
提问：
老师可否解释一下D选项错因
解答：
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