两个系统可以同时接通。
A.Two systems can be energized at a time. B.Two systems can be engaged at the same time. C.Two systems can be adopted separately.正确答案B
两个系统可以同时接通。
A.Two systems can be energized at a time. B.Two systems can be engaged at the same time. C.Two systems can be adopted separately.正确答案B
