试述典型流行性乙型脑炎的临床表现。
Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？ （Choose three.）（） [" The CoS value is trusted for 802.1p or 802.1q tagged traffic."," The voice VLAN feature is disabled by default."," The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4."," When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port."," PortFast is automatically disabled when a voice VLAN is configured."," The default CoS value for incoming traffic is set to 0."]
地壳表层
以下属于先秦时期设计成就的有（） ["石器","彩陶","建筑","青铜","丝织"]
财务预算的编制，按照预算指标与业务量的变动关系，可分为（） ["增量预算","滚动预算","固定预算","弹性预算"]
致突变物
