先生，不好意思。我可以退还这美术纸吗？我所要的是4k的，不是8 k。

Sorry, Sir. May I refund this art paper? What I need is 4k, not 8k.

youdao

解释二维(平面)图形和三维(立体)图形的不同：书和美术纸有什么相同之处？

Explain the differences between two-dimensional (flat) shapes and three-dimensional (solid) shapes. How are the book and piece of construction paper the same?

youdao

解释二维(平面)图形和三维(立体)图形的不同：书和美术纸有什么相同之处？

Explain the differences between two-dimensional (flat) shapes and three-dimensional (solid) shapes. How are the book and piece of construction paper the same?

youdao