GUO Yan-Fang1, WANG Ling-Jie2,3, GONG Shan2,4, WANG Ming-Zhao2
1. Faculty of Education, Beijing Normal University, Beijing 100875, China;
2. College of Chemistry, Beijing Normal University, Beijing 100875, China;
3. Tsinghua University High School-Qinhan, Xianyang 712000, China;
4. Changjun Liuyang Experimental School, Changsha 410311, China