Chang 'an University does not have a computer for material reexamination. Anyway, the ternary phase diagram will not be tested, and there must be an iron-carbon phase diagram. There are still some problems beyond the scope of the syllabus, such as vacancy defect equation. If you have any questions, ask me. I am a graduate student of grade 20 13. Come on, I forgot to tell you, Chang 'an University will focus on materials, so I must listen. The real questions all come from the teacher's concentration.