T-4-Q7 老讨论连接中没有解决的问题

萤火虫把夜烧了

This objection was reasonable when only early theropod clavicles had been discovered, but fossilized theropod clavicles that look just like the wishbone of Archaeopteryx have now been unearthed.（这个反对只有在此情况下是合理的：早期ther clavicles被发现，而化石化的看起来像wishbone即the fused clavicles 没有发现）

因为那些科学家提出这个反对，——推出科学家认为化石化的看起来像wishbone即the fused clavicles 不存在，即thre没有the fused clavicles

Vampirese

我觉得也是B
D说did not have fused clavicles，而原文只说differ

pwss

UP

luyao531

ding~

luyao531

T-4-Q5-Q7

     Although many lines of evidence indicate that birds evolved from ground-dwelling theropod dinosaurs, some scientists remain unconvinced. They argue that theropods appeared too late to have given rise to birds, noting that Archaeopteryx lithographica – the oldest known bird – appears in the fossil record about 150 million years ago, whereas the fossil remains of various nonavian maniraptor theropods – the closest known relatives of birds – date only to about 115 million years ago. But investigators have now uncovered bones that evidently belong to nonavian maniraptors dating to the time of Archaeopteryx. In any case, failure to find fossils of a predicted kind does not rule out their existence in an undiscovered deposit. Skeptics also argue that the fused clavicles (the “wishbone”) of birds differ from the unfused clavicles of theropods. This objection was reasonable when only early theropod clavicles had been discovered, but fossilized theropod clavicles that look just like the wishbone of Archaeopteryx have now been unearthed. Finally, some scientists argue that the complex lungs of birds could not have evolved from theropod lungs, an assertion that cannot be supported or falsified at the moment, because no fossil lungs are preserved in the paleontological record.

T-4-Q7

Which of the following is mentioned in the passage as an argument made by scientists who are unconvinced that birds evolved from theropod dinosaurs?

A.     There are no known theropod dinosaur fossils dating from a period after the time of Archaeopteryx.

B.      There are no known theropod dinosaur fossils that indicate the structure of those dinosaurs’ lungs.

C.     Theropod dinosaurs appear in the fossil record about 150 million years ago.

D.     Theropod dinosaurs did not have fused clavicles.

E.      Theropod dinosaurs had certain bones that look just like those of Archaeopteryx.

我选B,答案是D.
我觉得，作者提出了怀疑论者的三个问题。其中，前两个都是被后来的发现解决了，其中包括B,只有第三个，还没有被解决，所以应该是选项，可是为什么答案是D呢。