【多选题】使用示波器测试U341E型输入轴转速传感器波形时,下列说法正确的是 。
C.
正常工作时,发动机、车速越高,波形的周期短、幅值大
【单选题】使用示波器测试U341E型输入轴转速传感器波形时,下列说法错误的是 。
D.
正常工作时,发动机、车速越高,波形的周期短、幅值大
【单选题】They became friends again that day , Until then, they to each other for nearly two years
【单选题】They became friends again that day. Until then, they _____ to each other for nearly two years.
【单选题】三相异步电动机中旋转磁场切割转子导体的速度是()