Most of Wang Houxiong's books are mainly based on interpretation, supplemented by exercises. The handbook of important and difficult points is mainly written for important and difficult points, and the complete interpretation of teaching materials is mainly synchronized with the teaching materials, supplemented by exercises based on interpretation. If you compare the students who measure their weight with the difficulties, buy the difficulty manual. If you want to know more about each unit and course of the textbook, it is more appropriate to buy a complete interpretation of the textbook. The so-called (outline version) and (new curriculum standard version) are aimed at the use of local textbooks. Some provinces and regions use the "new curriculum standard version" after the curriculum reform, and some regions use the "outline version" teaching materials. At present, "Zhi Tao. Com "has a series of books on behalf of Wang Houxiong, with detailed introduction and explanation. Interested friends can go to Baidu to have a look at Zhi Tao. Com website to have a look.