ZHU Ru-Qin1**, QIAN Hai-Ru2, GUO Cong-Nian3, MIN Rong-Rong2
1. Gaoyou City Cheluo Town Junior High School, Yangzhou, 225600, China;
2. Gaoyou Nanhai Junior Middle School, Yangzhou 225600, China;
3. Gaoyou City Education Bureau Teaching and Research Section, Yangzhou 225600, China