下列选项中，属于报业多种经营范围的是（） ["广告","印务","投资","发行"]
Which service component in the wireless operate phase helps isolate and resolve an incident？（） ["change management","configuration management","incident management","acceptance test pla"]
国家质量监督检验检疫总局和各地质量技术监督部门对设备（）等违法行为实施行政处罚，应当遵守《锅炉压力容器压力管道特种设备安全监察行政处罚规定》规定。 ["设计、制造、安装、检验、改造、维修保养","修理","充装","化学清洗"]
建构主义学习理论的基本观点主要集中在对（）的描述上。 ["知识观","学习观","学生观","态度观","教学观"]
Cisco Catalyst 4500 Series switches are attractive to medium-size campuses with growth opportunities due to the switches enhanced security and which two other features？ （） [" enhanced multilayer software image"," connectivity to multiple types of WAN connections"," Cisco Unified Communications Manager"," QoS for converged networks"," modular， customizable component"]
简述变压器保护的一般运行规定？
