Generally speaking, there are two kinds of cross-exams, one is under the same discipline, which is usually called "small cross", and the other is a cross-exam between completely different disciplines, which is usually called "big cross". Generally speaking, the little cross teacher is more common and easier to explain, but the big cross still needs careful preparation, because the tutor often pays more attention to the "big cross" students.

Generally speaking, there are two kinds of cross-exams, one is under the same discipline, which is usually called "small cross", and the other is a cross-exam between completely different disciplines, which is usually called "big cross". Generally speaking, the little cross teacher is more common and easier to explain, but the big cross still needs careful preparation, because the tutor often pays more attention to the "big cross" students.