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[Reading Comprehension]
试题详情
题目：
It can be inferred that on the basis of the 1981 discovery of conodont remains, paleontologists could draw which of the following conclusions?
选项:
A、The earliest vertebrates were sedentary suspension feeders.
B、Ostracoderms were not the earliest vertebrates.
C、Defensive armor preceded jaws among vertebrates.
D、Paired eyes and adaptations for activity are definitive characteristics of vertebrates.
E、Conodonts were unlikely to have been predators.
答案:
B
提问：
为什么通过1981年的发现就可推断出O不是最早的vertebrates？
解答：
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阅读1842
提问：
为什么通过1981年的发现就可推断出O不是最早的vertebrates？
解答：
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阅读1843
提问：
请问老师怎么根据这个1981年的发现找到选项B啊？
解答：
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阅读1861
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