The EtherChannel between your LAN switch and the Internet router is not load-balancing efficiently. On the switch，there are several workstations with valid IP ranges. Which load-balance algorithms can you use in the switch in order to optimize this load balancing？ （） ["source IP address","destination IP address","per-packet load balance","destination MAC address","source MAC addre"]
关于1850 TSS，下列说法正确的有（） ["可与OMSN系列MSTP产品对接","可承载在DWDM网络上","现阶段，可替代ASON产品","可承载在CWDM网络上"]
班主任的政治思想素质主要包括政治素质和思想素质。
服务礼仪是列车服务质量的重要保证，是列车员人格和风度的体现，它能够满足旅客的心理需要，能调节（）之间的关系。 ["旅客与旅客","列车员与列车员","列车员与旅客","列车员与上级领导"]
足球比赛常用阵形中的（）的主要特点是中、后场的防守更加巩固，攻防更为灵活、机动，二、三线插上进攻和快速反击更为锐利。 ["“四三三”阵形","“四四二”阵形","“三五二”阵形","“四五一”阵形"]
怠速过高的原因有哪些？
