1. Geometry problem is the most important, proved and calculated. 2. Secondly, at most one solution can be used to solve the equations of filling and calculation problems, such as fractions and their applications. 3. The inverse ratio is the same as above. In fact, there is nothing to test, and the final difficulty should not be too great. After all, you should have a happy holiday. Relax, remember: those who have the foundation have the world.