The cisco ironport portfolio performs which service?（） ["reduces the downtime that is as assocoated with spam,viruses,and blended threats that are delivered via email","defends the penmeter from malicious users and unauthorized traffic","provides A secure communication path through the internet","determines if A user or device is authorized to access A switch port"]
规格为200mm的K93液压高速动力卡盘的楔心套行程是（）mm。 ["30","40","50","60"]
应用最为广泛的数据模型是（）。 ["层次模型","网状模型","关系模型","面向对象模型"]
共同违反治安管理的，根据违反治安管理行为人（），分别处罚。 ["年龄大小","在违反治安管理行为中所起的作用","是否亲自实施违反治安管理行为","在违反治安管理中所使用的手段"]
试述供应链绩效报告及其设计与编制原则。
腐蚀磨损
