I took the Harbin Institute of Technology exam this year, and now I'm waiting for my grades at home. I chose structural mechanics, didn't I? Material mechanics and structural mechanics, professional course guidance books are the guidance books for the connection or material strength in the library, because it is difficult to buy professional course guidance books in the general market ... For mathematics, Li Yongle's 10 set of sprint topics is enough, which is quite difficult. You should understand every topic and use English in New Oriental. Just have a good look before the exam. There is no need to watch it every day, and it may not have any effect.