Practice of selfteaching modes with multimedia in teaching of pratacultural science

• LIU Li, 
• Kuan-Hu DONG, 
• Qiang-Fang HU, 
• Ding-Nan LI, 
• Gui-Yang YANG, 
• Yong-Xin WANG, 
• Hui-Sen SHU, 
• Li-Xia DU, 
• DIAO Xiang, 
• Wen-Dun GAO, 
• Chi-Rong TONG