BIOGAS IS MAINLY USED FOR __________.A. TRANSPORT B. COOKING C. HEA...

2. - KIEM TRA 1 TIET LAN 4 KY 2
KIEM TRA 1 TIET LAN 4 KY 2
2. Biogas is mainly used for __________.A. transport B. cooking C. heating D. both B and C