A complete explanation of the new textbook. According to the relevant public information, fully interpret the new teaching materials, including the explanation ideas of the teaching materials, comprehensively analyze the teaching contents of the teachers, and fully interpret the new teaching materials. Textbooks, also known as textbooks, are teaching books that are written according to curriculum standards and systematically reflect the subject content. Textbooks are the embodiment of curriculum standards, which are different from other books. They are usually divided into volumes, units or chapters according to the academic year or semester.