What is service? (1) Service products服务产品 (2)5 rvice industry服务产业 (3)5 ervice occupations服务职业 (4) Service functions服务职能What is service? (1) Service products 服务产品 (2) Service industry 服务产业 (3) Service occupations 服务职业 (4) Service functions 服务职能