Statistical probability is to send sub-questions, and line generation is one of the best. The number of high-scoring parts is small, but the number of questions is generally difficult. There are so many high numbers that I have a headache during the exam. In previous years, the average score was almost the same as the first. Generally speaking, it is easy to review the second place, but if you work hard, you will take the first place exam. Examination No.2 is not suitable for people with poor foundation.