I used green leather and got the first place in the exam. I think that's enough. Choose a good book to review related books, and then refer to the outline. In fact, the teaching materials are not much different! Which green skin should Tongji 5 refer to? Isn't it on the cover? When choosing the answer book, compare it with the questions after class. Don't buy it wrong!

Supplement: I just went through the textbooks again, using Tongji Sixth Edition and the first two volumes (Higher Education Press).

ISBN 978-7-04-02 1277-8

We generally say Tongji Edition refers to Higher Education Press! It feels meticulous, that's enough! Version 5 is almost the same as version 6! Yes, the choice of reference books is very important!