The requirements for knowledge are divided into three levels from low to high, namely, understanding (understanding, imitation), understanding (independent operation), and mastering (application, migration). The higher-level requirements include the lower-level requirements.

1. Know (know, imitate): It is required to have a preliminary and perceptual understanding of the meaning of the listed knowledge, know what the content of this knowledge is, and imitate it according to certain procedures and steps, so that you can (or will) know and recognize related issues. The main behavioral verbs involved in this level are: cognition, understanding, cognition, imitation, seeking and understanding.

2. Understanding (independent operation): It is required to have a profound rational understanding of the listed knowledge, know the logical relationship between the knowledge, be able to correctly describe the listed knowledge and express it in mathematical language, be able to compare, judge and discuss related problems with what you have learned, and have the ability to solve simple problems with what you have learned. The main behavioral verbs involved in this level are: description, explanation, expression, representation, speculation and imagination.

3. Mastery (application, migration): It is required to be able to deduce and prove the listed knowledge, and use the learned knowledge to analyze, study, discuss and solve problems. The main behavioral verbs involved in this level are: mastering, deriving, analyzing, deducing, proving, researching, discussing, applying and solving problems.