HUANG Yuan-Dong1, YAN Chun-Geng2, LU Chun-Mei3, ZHOU Qing4
1. The No. 11 Middle School of Zhengzhou, Zhengzhou 450016, China;
2. Department of Educational Affairs, Northwestern Polytechnical University, Xi'an 710072, China;
3. Shenzhen Senior High School, Shenzhen 518040, China;
4. School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China