1. difficulty: version a of senior high school mathematics published by PEP is simpler than version b, and version b has more contents than version a, which is more difficult. Especially the exercises in version B, especially the exercises in group B, are very difficult.
2. Editing module and key points: Version A is a traditional geometric way to solve solid geometry problems with axiomatic theorem as auxiliary line, and pays more attention to the examination of spatial imagination thinking. Version B is a new content, which follows the knowledge of plane vector in Volume 2 of Senior One, uses the methods and concepts of space vector to solve solid geometry problems and algebraic calculation and solution of geometric problems, pays more attention to the extension of concepts, reveals the essence of concepts more comprehensively, and is suitable for students interested in mathematics.
3. Implementation area: Version A and Version B are distinguished by "area", that is, one version of teaching materials is generally used in the same area.