1. Undergraduate programs include key undergraduate programs (1A), 2A, 2B, etc. They are subordinate. 2A belongs to undergraduate course, but undergraduate course contains more things than 2A.

Second, 2A belongs to two schools, and 2A refers to the better school of the two schools.

Background: 1A, 2A, 4A, 1B, 2B, 3B all refer to the grades of universities. 1 stands for key universities approved by the Ministry of Education, commonly known as one school, 2 for non-key universities, commonly known as two books, and 3 for three books. And A and B refer to the results of similar schools.

Education:

Undergraduate and graduate students are the names of academic qualifications. At present, China's junior college adopts a three-year system, and its orientation is still vague. Some people think that junior college is an important part of academic education, and college students can be promoted to undergraduate courses. Those who meet certain conditions can directly take the postgraduate entrance examination.

Some people think that junior college is a part of vocational education, and the important task is to train middle and senior technical talents, which is what we usually call applied talents; Others think that junior college is a transitional education level.