LIU Hong-Lu1,2, SONG Xiao-Meng3, HUANG Yan-Ning4**, WANG Lei1,2,5**, DING Ling-Qiao3, ZUO Xu-Jing3, TANG Tian-Wei2, WANG Lan-Fei2
1. National Research Center for Educational Materials, Beijing 100875, China; 2. College of Chemistry, Beijing Normal University, Beijing 100875, China; 3. Beijing Bayi School, Beijing 100020, China; 4. College of Teacher Education, Capital Normal University, Beijing 100048, China; 5. Faculty of Arts and Sciences, Beijing Normal University, Zhuhai 519085, China