WHAT DOES THE SIGN MEAN

2. - DE KIEM TRA 1 TIET MON TIENG ANH LOP 11 SO 1 TRUONG THPT DOAN THUONG HAI DUONG NAM HOC 2016 2017 CO DAP AN
Tiếng Anh DE KIEM TRA 1 TIET MON TIENG ANH LOP 11 SO 1 TRUONG THPT DOAN THUONG HAI DUONG NAM HOC 2016 2017 CO DAP AN
2. What does the sign mean?