T-4-Q7

taoliang

Although many lines of evidence indicate

that birds evolved from ground-dwelling

theropod dinosaurs, some scientists remain

unconvinced. They argue that theropods

(5)
                 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, where

-as the fossil remains of various nonavian

(10) 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

(15) 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

(20) 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

(25) 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

(30) 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?

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

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

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

4. Theropod dinosaurs did not have fused clavicles.
5. Theropod dinosaurs had certain bones that look just like those of Archaeopteryx.

我觉得 这里应该是B 但答案是D 问问大家意见

newyearagain

我也觉得选B。 因为已经出土了类似的骨结构，但是没有发现肺结构的化石。

lychee1842

这道题我一开始也错了，

但是对答案的时候想了过来

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

根据文章的含义，这句话是一个事实，

而不是unconvinced scientists的arguement

与B相比，D就直白的多了，指出来这一点，就会很有效的削弱

伊布拉莫维琨

pwss

UP

萤火虫把夜烧了

There are no known theropod dinosaur fossils that indicate the structure of those dinosaurs’ lungs.
我觉得吧，应该这么解释：lung的化石根本就不存在。那么ther的也不存在，鸟的也不存在，这个事实就完全没有意义了、、、所以错。楼上的楼上的楼上解释有点含糊