Occupational quality refers to the inherent basic qualities of workers formed and developed through education, labor practice, and self-cultivation on the basis of certain physiological and psychological conditions. According to the above definitions, Which of the following are not professional qualities: (). ['Physiological and genetic factors of vocal singers different from ordinary people.', "The writer's keen sense of life and strong language skills.", "The painter's ability to distinguish colors and space imagination different from ordinary people.", "Teachers' extensive knowledge and noble personality."]