批改

The auther of the reading passage give some reasons that the Sinosauropteryx was not a feathered dinosaur.But the lecture claim that the fine lines are the feathered dinosaur strongly.

According to the lecture that the lines are not the decomposition of the dinosaur's skin, the other animals's skin also can't see the decomposition, and they had beautiful and well-preserve skin as well as the Sinosauropteryx, it's functional structure for Sinosauropteryx.

The reading passage, by the contrast, suggest that the fine lines may form after the dinosaur's desth.

The second point, of different between the lecture and the reading passage concerns that the feathers and the frills are different chamical consistent, and feathers have a kind of protein but the frills are not, and the Sinosauropteryx contained this kind of protein.

So, the fine lines are more likely to feathers.

Finally, the lecture argues that feathers also can use for display like the birds had detials feather, witch is long and colorful, and the Sinosauropteryx use it to display either.

And then, it also use it to fly.

However, the reading passage contents that the fine lines were useless Sinosauropteryx to fly or assist them keep warm.