复合型顶板应采用伪俯斜工作面开采,并使垂直工作面方向的向下倾角为()度。
A. 1~2
B. 2~3
C. 3~4
D. 4~6
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派人进入封闭舱室灭火时,应将门全部打开,用水雾流前后来回交叉喷扫舱室。
A. 正确
B. 错误
使用手砂轮对挖掘机履带销子进行磨削时应该注意的事项有哪些?
“E5015”是碳钢焊条型号完整的表示方法,其中“50”表示熔敷金属的屈服点为500MPa。
A. 正确
B. 错误
Based on the need to limit processing and bandwidth utilization due to dynamic routing protocol operation, the foll owing routing requirements have been specified for your network. - partial and incremental routing updates - only the devices affected by a topology change perform route recomputation - route recomputation only occurs for routes that were affected Which dynamic routing protocol should be deployed in your network to best meet these requirements?()
A. BGP
B. OSPF
C. IS - IS
D. EIGRP
E. RIPv2