When advancing the construction new-type urbanization was put forward to being an important move of urban economic development in the following decade in the 18
On the basis of the definition of technological innovation and efficiency,based on the DEA method,this paper takes the panel data of 20 listed companies in Chin
Due to the high hygroscopicity of the plastic packaging material, the device is inevitably subjected to high temperature or high humidity environment during the
This paper mainly studies the Japanese policy, especially the Positive List System and Health Quarantine System, on the Chinese agricultural products exports, t
In recent years,with the progress and development of China's social economy,the living conditions of our people have been significantly improved,which has i