1, test subject difference: version A mainly includes Chinese, mathematics, foreign languages and comprehensive science (including physics, chemistry, biology, etc. ) and other major disciplines. The B version is in the A version, adding the setting of elective subjects. Students can choose different elective subjects according to their interests and specialties. The elective subjects are arts and sciences, such as history, geography, politics, physics, chemistry and biology.

2. Differences in examination contents: Version A mainly examines students' ability to master and apply basic knowledge, and pays attention to the breadth and depth of subject knowledge. In addition to examining students' ability to master and apply basic knowledge, version B also pays attention to the cultivation of students' comprehensive quality and innovative ability. The elective courses are more flexible and can better meet students' individual needs.