Cisco终端安全解决方案的首要组件有（） ["IronPort","Cisco NAC","SAN","CSA"]
下列哪些合同，当事人一方有权请求人民法院或者仲裁机构变更或者撤销（）。 ["因重大误解而订立的合同","显失公平的合同","以欺诈、胁迫等手段使对方在违背真实意思的情况下订立的合同","乘人之危使对方在违背真实意思的情况下订立的合同","以合法形式掩盖非法目的合同"]
Which two are advantages of static routing when compared to dynamic routing？（） ["Security increases because only the network administrator may change the routing tables.","Configuration complexity decreases as network size increases.","Routing updates are automatically sent to neighbors.","Route summarization iscompued automatically by the router.","Routing traffic load is reduced when used in stub network links","An efficient algorithm is used to build routing tables，using automatic updates.","Routing tables adapt automatically to topology changes."]
《铁路交通事故应急救援和调查处理条例》事故造成人身伤亡的，铁路运输企业应当承担赔偿责任；但是人身伤亡是不可抗力或者受害人自身原因造成的，铁路运输企业不承担赔偿责任。
（）是指在物流系统中的功能要素之间存在着损益的矛盾。
打桩设备包括哪些部分？
