第33题:[多选题]处理刀片的OK指示灯熄灭的原因是()?
What's the reason of "the ok indicator is off" in processing board ? A.单板未上电
the board is not power on B.单板未插紧
the board is not insert properly C.单板工作正常
the board is working normally D.单板有告警
there's alarm in the board E. F.12 参考答案:AB