题目内容

利用已储能的弹簧为动力使断路器动作的操动机构称为（）机构。弹簧储能通常由电动机通过（）装置来完成。

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Your network includes Windows Server 2008 R2 Hyper-V failover clusters that support highly available virtual machines （VMs）. You manage virtual machines by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2. You are planning to deploy a large number of VMs to the failover clusters. All VMs must remain available when one node of each cluster is offline. You need to determine the best placement for the new VMs among the clusters. Which two actions should you perform？（）

A. For each cluster， set the cluster reserve to 1
B. In each cluster， place one host server in maintenance mode
C. Determine the placement for each VM by using the data that is generated by running the Get-VMHostRating PowerShell cmdlet
Determine the placement for each VM by using the data that is generated by running the Get-VMPerformance PowerShell cmdlet

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蓄电池在20℃的电解液比重为（）。

A. 1.180
B. 1.280
C. 1.380
D. 13.0

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火焰式火警探测器的工作原理是（）

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便携式收费机无法迚入收费系统的原因（）。

A. 是否是收费程序文件被破坏了
B. 收费程序的快捷方式是否放到开始菜单的启动里
C. 便携式收费机散热问题，温度高
D. 便携式收费机电源供电不足

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