Research on the development of less teaching and more learning model in the information age Research on the development of the periodical information resources Research on the development of information industry and tourism industry in the internet plus era Research on the development of agriculture whole process informatization Research on the user driving force of crowdsourcing community in the information age research on the development of China's diverse public opinion field Research on the development of electronic information engineering technology in China Research on the development of electronic information engineering technology in china research on the development of China's second demographic dividend from the perspective of active aging