Optional course for liberal arts 1 series.

For example, elective course 2- 1, liberal arts is elective course 1- 1, and liberal arts elective series are all distinguished in this way.

There are modules in the book to practice answering after class.

I'm sorry, the People's Education Edition is indeed divided into version A and version B, but their teaching contents are basically the same to some extent. It is possible to take 2- 1, which is more comprehensive. The difference between a and b is slightly different.

There is an error on it. We don't need anyone to teach you the edition here, so we can't help you much.