当电机转向错误时,互换三根输入导线中的任意两根,是没有效果的。
A. 正确
B. 错误
高速加工机床的进给系统越来越多的采用()驱动。
A. 交流电机
B. 直流电机
C. 步进电机
D. 直线电机
You need to call an unmanaged function from your managed code by using platform invoke services. What should you do?()
A. Create a class to hold DLL functions and then create prototype methods by using managed code.
B. Register your assembly by using COM and then reference your managed code from COM
C. Export a type library for your managed code.
D. Import a type library as an assembly and then create instances of COM object.
SoftX3000对话单池剩余空间设置了二级门限,当话单池剩余空间到达一级门限()时,产生告警;当达到二级门限(100%)时,则限呼并产生告警。
A. 60%
B. 70%
C. 80%
D. 90%