较大事故的调查期限为（）。 ["10天","20天","30天","60天"]
熔断器为一次性元器件。
试述影响动机形成的因素？
建筑的耐火等级可分为（） ["3","4","5","6"]
In CRS Administration, when you add a JTAPI Call Control Group, what is created on the Cisco CallManager?（） ["CallManager Call Control Group ","CRS CTI Route Point ","CRS JTAPI User ","CTI ports ","CRS Call Control Group ","CTI Route Points and directory numbers&e"]
环境退化
