Proportion of topics selected in the National Mathematical Model Competition in 2022
5 to 1. Query and display according to relevant information; In 2022, the proportion of topics selected in the mathematical modeling competition will be 5: 1. The ABC and A questions in previous years' competitions are both difficult, and they are both physical/engineering professional questions, and the number of people selected each year is the least. Xiaobai tries to choose a topic that he can understand and be sure of.