Which two statements about the DiffServ model are true？（） ["a class can be identified as a single application， multiple applications with similar service needs，or be based on the source or destination IP address","a drawback of the DiffServ field in the MAC header to mark frames into behavior aggregates （BAs）","DiffServ uses the DiffServ field in the MAC header to mark frames into behavior","the DiffServ field occupies the same eight bits of the MAC header that were previously used for the ToS field","the first six high-order bits of the DiffServ field are used to identify the Resource Reservation Protocol （RSVP） value","the primary goal of DiffServ is scalability"]
简述设定游戏角色在游戏中的应用。
下述不属于急性冠脉综合征的是：（） ["初发性劳力性心绞痛","变异性心绞痛","急性ST抬高性心肌梗塞","稳定性劳力性心绞痛","急性非ST抬高性心肌梗塞"]
在辛亥革命的酝酿阶段，资产阶级领导的爱国运动中，规模较大具有代表性的有（）和保路运动等。 ["拒俄运动","拒法运动","抵制美货运动","收回利权运动"]
What is the first 24 bits in a MAC address called?（） [" NIC"," BIA"," OUI"," VAI"]
构造解析
