CHEN Bo-Yin1, WANG Ji-Chang2**, CHEN Jue-Shu3, GUO Hong-Yan1
1. Guangzhou No. 7 Middle School,Guangzhou 510080,China;
2. Guangzhou Institute of Education,Guangzhou 510080,China;
3. Yuexiu District Teacher Training School of Guangzhou, Guangzhou 510080,China