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

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.30

B.50

C.70

D.90

考点:炉外精炼工初级炉外精炼工初级炉外精炼工题库
题型:单项选择题

俗话说:“一叶遮目不见泰山”.这其中的物理原理是(  )

A.光是直线传播的

B.光的反射定律

C.光的漫反射

D.光的镜面反射

题型:单项选择题

警察产生的经济条件是( )

A.生产力的发展和私有制的产生

B.阶级矛盾和统治阶级内部矛盾的不可调和性

C.维护统治秩序与惩罚犯罪的客观需要

D.国家机器的形成

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.routing

B.forwarding

C.transmission

D.management

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

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

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