A.6V/1.3 B.3V/2.5 C.2.0/1.5 D.2.5V/1.3
A.16V/1.1 B.14.4/1.2 C.20V/1.3 D.17.6/1.2
A.小/低 B.小/高 C.大/高 D.大/低