泵轴一般采用的材料为（） A3钢；。 45号钢；。 铸铁；。 合金钢。
What is IPv6 router solicitation?（） a request made by a node to join a specified multicast group。 a request made by a node for its IP address。 a request made by a node for the IP address of the DHCP server。 a request made by a node for the IP address of the local router。
简述国库集中支付制度的涵义。
You are a network administrator for All servers run Windows Server 2003. A network server named Testking1 functions as the main file server. Testking1 is backed up each night by using the Backup utility. You perform a test restoration of Testking1 by using the Backup utility. You discover that files that are open during the backup process are not being backed up. You need to ensure that open files are backed up successfully. What should you do?（） Enable volume shadow copies on the partitions that are being backed up.。 Disable volume shadow copies on the partitions that are being backed up.。 Select the Verify data after backup check box in the Advanced backup options of the backup job.。 Clear the Disable volume shadow copy check box in the Advanced backup options of the backup job.。
网架在设计位置就地总拼后，利用安装在柱子上的小型设备（穿心式液压千斤顶）将网架整体提升到设计标高然后下降、就位的方法称为（） 升梁抬网法。 单提网架法。 升网滑模法。 网架爬升法。
有三个投资方案，甲方案每年可获利16％；乙方案每年可获利15％，每月复利一次；丙方案每年可获利15％，每季复利一次。方案优劣顺序正确的是（）。
