ZP?W1-18型无绝缘移频自动闭塞,接收盒绿灯继电器电压（ ）。[321040101]
A.AC18.0V±1.0V
B.DC18.0V±1.0V
C.AC23.0V±3.0V
D.DC23.0V±3.0V
正确答案是D