《铁路旅客运输管理规则》票额分配计划是旅客运输能力的运用计划，于新列车运行图实行前编制并与新运行图同时实行。实行过程中，可视客流变化，图定列车数量、编组、运行区段变化情况进行局部调整。
目前使用的氧传感器有（）。 ["氧化锆（ZrO2）式","氧化钛（TiO2）式","宽量程氧传感器","空燃比式"]
《铁路旅客列车消防安全管理规定》不吸烟车厢应有（）标志，乘务人员要对在车厢内吸烟的旅客进行劝阻，提醒旅客不得乱扔烟头火种。 ["禁止吸烟","警示","安全","卫生"]
众多案例表明，价值管理介入项目建设周期越晚，对整个项目所带来的效益就越显著。
A network administrator wants to ensure that only the server can connect to port Fa0/1 on a Catalyst switch. The server is plugged into the switch Fa0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of the server is allowed by switch port Fa0/1？ （） ["Configure port Fa0\/1 to accept connections only from the static IP address of the server.","Employ a proprietary connector type on Fa0\/1 that is incompatible with other host connectors.","Configure the MAC address of the server as a static entry associated with port Fa0\/1.","Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address.","Configure port security on Fa0\/1 to reject traffic with a source MAC address other than that of the server.","Configure an access list on the switch to deny server traffic from entering any port other than Fa0\/1."]
利用相同的评价指标体系，间隔一定的时间，对同一组被评对象进行两次评价，然后计算两次评价结果之间的相关系数，求得的相关系数为（）。
