1, with different emphasis.

The 53A edition mainly aims at the basic questions, systematically and comprehensively explains the knowledge in the textbook, and explains the real questions of the college entrance examination in recent years. The 53 B version is mainly exercises, but it is also exercises, but most of them are college entrance examination questions, and the college entrance examination questions are excellent. The college entrance examination review questions are suitable for sprint training in senior three.

2. Different time to market

Version 53A is published in February every year, including the latest simulation questions of that year, but excluding the college entrance examination questions of that year; Version 53 B is listed in mid-June every year, including the latest college entrance examination questions and simulation questions of that year.

3. Different stages of application

Version 5-3-A is suitable for the second round review of senior three students and senior two students. Version 53 B is suitable for the first and second rounds of review of senior three students in that year.