2, 20 16, the difficulty of the three exams in the college entrance examination should take care of the reality of the four provinces in a balanced way. In fact, the difficulty of the test questions in the four provinces is different, some are above Grade A, and some may be below Grade A. For example, the difficulty of the test questions in Sichuan Province is much higher than Grade A. If the difficulty of Grade C is too low this year, it may cause shock in Sichuan. Therefore, the difficulty of volume C is in the middle of the difficulty of four provinces and cities.