Which three statements are true about the data traffic characteristics of voice traffic？ （） ["latency must be kept below 150 ms","latency is not a concern as long as jitter is kept below 30 ms","voice packets do not require a specific type of queuing","voice packets are rather small","voice packets require TCP for rapid retransmission of dropped packets","voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload"]
内部动机
Which three protocols use TLVs to carry attributes？（） ["Cisco Discovery Protocol","Label Discovery Protocol","Border Gateway Protocol","OSPF","RIP version 2"]
麦金农认为，发达国家的投资理论是建立在下面哪些条件之上的？（） ["投资具有递增的规模效应","有健全的市场机制并能正常运行","投资主要依赖内源型融资","投资具有不变的规模报酬","投资主要依赖发行债券或股票等外源型融资"]
机能性角色
甲公司持有一张由乙公司出票、经丙公司背书转让获得的银行承兑汇票。在该汇票到期后，甲公司向承兑银行提示付款时遭到拒绝，承兑银行拒付的理由是：该汇票上银行的签章是伪造的，该银行并未承兑过这张汇票。甲公司于是向丙、乙公司进行追索，丙公司声称该汇票是乙公司某业务员给付的，并经乙公司背书转让取得，伪造签章的责任应由乙公司承担，与其无关。乙公司则答复说，该汇票出票及背书转让都是其一业务员伪造公司签章所为，应由司法机关追究该业务员的责任，与乙公司无关。经公安机关调查，发现乙公司公章使用管理混乱，才给其业务员以可乘之机伪造签章。乙公司和其业务员分别要承担什么责任？
