PMC模式主要应用于以下哪些项目中（） ["A.有不同国家的公司同业主进行管理的项目 ","B.PMC模式主要适用于资源开发、基础设施、大型制造业和公共服务设施项目 ","C.业主的项目管理经验不足以担当该项目管理的项目 ","D.项目庞大，工艺装置多而复杂的项目 ","E.业主追求项目最佳目标的项目"]
As a Cisco Network Engineer, you have to master the knowledge of the Cisco Storage Area Network solution for the data center. Which three of the following are features of it? （）(Choose three.) [" It provides multiprotocol support."," It allows you to create separate networks on the VSAN."," It allows you to migrate to new technologies without a complete equipment upgrade."," It reduces cost and complexity by providing an easy transition to evolving technologies."]
患者于某，76岁，气管切开术后2年，护士给予气管切开套管内套管更换及清洗，需要评估的内容是：（） ["患者的病情、意识、呼吸形态、痰液、血氧饱和度和合作程度","患者的气管切开伤口","气管套管的种类、型号","气囊压力","气管切开套管内套管有无破损及异物"]
外部负效应
边坡破坏主要形式之一（）。 ["岩爆","侧向位移","崩塌"]
说出电梯中常用的低压电器名称（不少于3种），及作用。
