Training course is a course system that directly serves enterprises. It is not only an educational activity, but also a production behavior of enterprises. It has the characteristics of service, management, practicality, pertinence, experience, practicality and timeliness. Offering training courses should embody the following basic principles: ① The design of training courses should meet the needs of enterprises and students; ② The design of training courses should conform to the cognitive rules of adult students; ③ The setting of training courses should reflect the basic goal of enterprise training function and develop human resources. So this question should choose BCE.