1, the strength of the schools is different: two A-class universities have strong comprehensive strength. The comprehensive strength of the two Class B schools is relatively weak.

2, the scores are different: two A-class scores are high and two B-class scores are low.

3. Different educational institutions: the second is a state-owned university. The two B universities are private universities.

4. Different school levels.

On the whole, two A's are better than B's, and A's are better than B's in the same batch of colleges. Each university will form its own dominant disciplines and majors, each with its own advantages and characteristics. We can't simply use Class A and Class B to distinguish the good from the bad of a university. ..