WU Ming-Zhu1, HU De-Sheng2, DENG Dong-Li1, ZHOU Yong-Fu1, LI Ying1
1. Faculty of chemical and pharmaceutical engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China; 2. College of Extended Education, Chongqing Industry Polytechnic College, Chongqing 401120, China