问题:
若2x 5ay b+4与-x 1-2by 2a是同类项,则b a的值是
A.2
B.-2
C.1
D.-1
若2x 5ay b+4与-x 1-2by 2a是同类项,则b a的值是
A.2
B.-2
C.1
D.-1
A.2
B.-2
C.1
D.-1
参考答案: