The second diagnostic test is difficult for the following reasons: 1. Mathematics emphasizes the calculation ability, and the examination paper of the second diagnosis strengthens the investigation of the calculation ability. Compared with the first diagnostic test paper, the second diagnostic test paper obviously improves the requirements for computing power, and highlights the characteristics of the new high school textbooks; 2. The overall difficulty of English has increased. The second diagnosis of English is as difficult as the first diagnosis. In addition to adding new questions for the second diagnosis, the last two listening questions have also become fill-in-the-blank questions, requiring students to fill in the correct answers according to what they have heard. 3. Chinese reading comprehension increases the difficulty, and it is difficult and takes a long time to examine and choose the Chinese test questions in classical Chinese. Which is the most difficult, the first and second diagnosis or the senior high school entrance examination?