Declarative knowledge is knowledge about "which of the following is the world". It can be directly stated. The required psychological process is mainly memory. Procedural knowledge is knowledge about "how to do". It cannot be stated directly. It can only be inferred by a certain form of assignment. It exists. According to the above definition, Which of the following classification is correct. ['’Repairing bicycles is declarative knowledge, and‘ music appreciation ’requires procedural knowledge.', '"The capital of the United States is Washington" is declarative knowledge, ‘addition and subtraction’ requires procedural knowledge.', '"Boiling at 100 ° C with water" is declarative knowledge, "the molecular formula of water is H, O" is procedural knowledge.', '"riding archery" is declarative knowledge, "red light stop. Green light line" is procedural knowledge.']