1A is a key university (1)

2A2B is an ordinary undergraduate course (two books).

3A3B is an ordinary college.

A-line class is cheap, but B-line class is expensive.

Now that the AB class has been merged, it is no longer divided into AB classes on the surface, but the difference between AB classes is still the same as before the merger.

1 stands for the first batch of admission (one book)

2 represents the second batch of admission (in duplicate)

3 represents the third batch of admission (specialist)

"1A" refers to national key universities (such as 2 1 1, 985).

"2A" refers to public undergraduate courses.

"2B" refers to the self-funded undergraduate course.

"3A" refers to public colleges and universities.

"3B" refers to self-funded colleges and universities.