TJWX-2000型信号微机监测电源屏监测点置于何处（）
A、电源屏输入端
B、轨道继电器端
C、电源屏输出端
D、分线盘
参考答案：A, C
When winter comes, the days get _____ in Beijing. [ ]
A. short and short
B. shorter and shorter
C. long and long
D. longer and longer
出口换汇成本
