当处理结束时,当真空度降到()kpa以上时,选择快速下降直至钢包降至出钢车。 A.3 发布时间:2018-05-27 22:08 │ 来源:www.tikuol.com 题型:单项选择题 问题: 当处理结束时,当真空度降到()kpa以上时,选择快速下降直至钢包降至出钢车。A.30B.50C.70D.90
题型:单项选择题 Traditional IP packet forwarding analyzes the____(1)____IP address contained in the network layer header of each packet as the packet travels from its source to its final destination.A router analyzes the destination IP address independently at each hop in the network.Dynamic ____(2)____protocols or static configuration builds the database needed to analyze the destination IP address(the routing table).The process of implementing traditional IP routing also is called hop—by—hop destination—based____(3)____routing.Although successful,and obviously widely deployed,certain restrictions,which have been realized for some time,exist for this method of packet forwarding that diminish its____(4)____.New techniques are therefore required to address and expand the functionality of an IP—based network infrastructure.This first chapter concentrate on identifying these restrictions and presents a rew,architecture,known as multipIeprotocol____(5)____switching,that provides solutions to some of these restrictions.(2)A.routingB.forwardingC.transmissionD.management 查看答案
题型:单项选择题 1985年3月,国务院颁发《关于批转财政部关于对进出口产品征、退产品税或增值税的规定)的通知》,规定从( )起对出口产品实行退税政策。A.1985年3月1日B.1985年4月1日C.1985年5月1日D.1985年6月1日 查看答案
题型:单项选择题 下列不属于施工安全管理实施基本要求的是()。A.必须建立健全安全管理保障制度B.必须把好安全生产的“七关”标准C.必须建立安全生产值班制度,并有现场领导带班D.必须取得《安全生产许可证》后方可施工,但有特殊情况的除外 查看答案