已办理预约预订车票的人可在（）办理任意变更。 ["规定的取票期限后一日内","规定的取票期限前","客票的有效期内","售票地所在车站"]
按照我国国家标准《电磁辐射防护规定》，负责对超过豁免水平（3MHz以上等效辐射功率100瓦）电磁波辐射体所在的场所以及周围环境的电磁辐射水平进行监测的是（） ["其拥有者","所在地区环境保护部门","所在地区业余无线电协会","所在地区无线电管理机构"]
列车员要认真执行停开、动关、出站锁的制度。
Refer to the exhibit. According to the output of the command show tag-switching forwarding-table， which four of these statements are true？（） ["Packets to the IP address 10.10.10.5\/32 will be tagged with "17" toward the next hop.","Label "19" will be advertised to MPLS neighbors so that they can use this label to reach the IP address 10.10.10.6\/32.","IP address 10.10.10.4\/32 is directly connected to the neighbor router on serial 3\/0.","Packets arriving with label "17" will be forwarded without any label toward serial 4\/0.","Packets arriving with label "20" will be forwarded with label "21" after label-swapping.","Label "20" is advertised to MPLS neighbors so that they can use this information to reach the prefix 10.10.10.8\/32."]
人体心肺功能的强弱是反映一个人（）的重要标志。 ["生理状况","体质状况","心理状况","身体状况"]
家长学校
