北魏孝文帝（467―499）
某研究者预进行吸毒人员一次性注射器使用知识的调查研究，较适宜的抽样方法为（） [" 方便抽样"," 网络抽样"," 配额抽样"," 目的抽样"," 系统抽样"]
带电装表接电工作时，应采取防止（）的安全措施。 ["短路和电弧灼伤","断路和接地","跌伤或碰伤","特殊天气"]
The network administrator would like to generate synthetic traffic using the Service Assurance Agent contained in Cisco IOS. Which CiscoWorks network management application will be used to report the latency and availability for configured traffic operations on an end-to-end and hop-byhop (router-to router) basis？（） [" nGenius Real-Time Monitor"," Cisco View"," Device Fault Manager"," Internetwork Performance Monito"]
伦理学
社会情境
