CRH1型动车组速度传感器用于测量牵引电机轴的旋转数量,检测旋转方向,测量信号由()接收,进行监控测量。
A.DCU/A
B.DCU/L
C.DCU/M
D.BCC/I
参考答案:C
It’s unfair to discuss his case if he is not____. [ ]
A. present
B. presently
C. absent
D. presence
圆领