Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree Protocol IEEE 802.1D？（） ["Designated Root Cost","bridge ID priority","max age","bridge ID MAC address","Designated Root Priority","forward delay"]
监理单位开展监理工作，应遵守下列（）规定。 ["严格遵守国家法律.法规.规章和政策，维护国家利益.社会公共利益和工程建设当事人各方合法权益","禁止转让、违法分包监理业务","可以聘用无监理岗位证书的人员从事监理业务","禁止采取不正当竞争手段获取监理业务","不得与所承担监理项目的承包单位.设备和材料供货人发生经营性隶属关系"]
如果管理员执行这个命令router（cfg）#logging trap 4什么级别的将被困 ？（） ["紧急","注意事项","警报","错误","警告"]
《铁路旅客运输规程》客流量较大的车站不用设失物招领处。
按企业业务性质可将企业物流分为哪几种？各有何特点？
对待教育管理面临哪些挑战？
