Which two queuing methods will allow a percentage of the available bandwidth to be allocated to each queue？（） ["first-in， first-out queuing （FIFO）","priority queuing （PQ）","custom queuing （CQ）","weighted fair queuing （WFQ）","class-based WFQ （CBWFQ）","low latency queuing （LLQ）"]
数字测速方法有几种？各有什么优缺点？
液压油的选用，应依据设备使用工况，选用（）的抗磨液压油。 ["耐高温；","耐低温；","符合当地条件；","A和B。"]
玩具有哪些教育作用？
造成税觉的随意运动的原幽是（） ["色彩对比鲜明","广告刺激强度大","广告具有新异性","立体内在要求的目的和任务"]
我国证券公司传统的三大业务及其含义是什么？
