In recent years, the proportion of easy, medium and difficult problems in Sichuan college entrance examination mathematics is basically 3: 5: 2, in which multiple-choice questions are 3: 2: 1, fill-in-the-blank questions are 2: 1, and the ratio of intermediate questions to difficult questions is 2: 1. "Deleting this proportional value means that the proposition may be more flexible, but it is impossible to predict whether it may be more difficult or simpler."