简答题1、According to the function of the expert controller in the control system, it can be divided into two types, they are（ ）. A、 Human simulating expert controller B、Direct Expert Controller C、 Expert Fuzzy Controller D、 Indirect expert controller多选题The key problem for building knowledge base is how to express the acquired knowledge. （ ）多选题Direct expert controller is used to replace conventional controller and directly control the production process. （ ）多选题The general model of an expert controller can be represented as U = f(E, K, I, G) with its basic form: IF E AND K THEN (IF I THEN U). （ ）