Which two routing interface parameters are supported in OSPF implementations?（） [" retransmit - interval"," de ad - interval"," stub area"," virtual link"," NSSA area"]
音乐
What is the subnetwork address for a host with IP address 201.100.5.68/28?（） [" 201.100.5.0"," 201.100.5.32"," 201.100.5.64"," 201.100.5.65"," 201.100.5.31"," 201.100.5.1"]
细胞上含有（），其血清中没有抗A和抗B凝集素者，其血型为（）。
安全阀检验的目的是（） ["为了保证安全阀各项技术性能指标满足法规、标准的要求","主要保证整定压力和密封性能","保证安全阀的机械性能"]
党的根本宗旨是什么？
