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简答题 教学管理的核心是班级管理。
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触发器是一个能由系统自动执行对________修改的语句。
简答题 德育过程就是个体社会化和个性化的统一。
网管人员在监测网络运行状态时，发现下列现象：服务器上有大量的 TCP连接，收到了大量源地址各异、用途不明的数据包；服务器收到大量的 ARP报文。网管人员的判断是（ 54），针对前一现象将采取的措施是（55），针对后一现象可能采取的措施是（56）。 空白处（55）应选择（）
The network layer provides services to the transport layer. It can be based on either（71）. In both cases，its main job is （72） packets from the source to the destination. In network layer，subnets can easily become congested，increasing the delay and（73）for packets. Network designers attempt to avoid congestion by proper desing,Techniques include （74） policy，caching，flow control，and more. The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service. The methods that can be used for this include buffering at the client，traffic shaping，resource（75），and admission control. Approaches that have been designed for good quality of service include integrated services (including RSVP), differentiatd services, and MPLS. 空白处（73）应选择（）
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