题目内容

R、L、C串联,正弦交流电路发生串联谐振时()。

A. 电路中阻抗最大,电流最小
B. 电路中电流最大,阻抗最小
C. 电阻上电压最小
D. 电感电容上电压等于零

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各级调度部门实行统一的指挥调度和()。

A. 属地分工领导
B. 业务上垂直领导
C. 自上而下垂直领导
D. 下级调度部门是上级调度部门的派出机构

联合下发文件时,主办机关应在文头中排列在()。

A. 最后
B. 最前
C. 中间
D. 末尾

Your company has Windows Server 2008 R2 file servers. You need to recommend a data recovery strategy that meets the following requirements: èBackups must have a minimal impact on performance. èAll data volumes on the file server must be backed up daily. èIf a disk fails, the recovery strategy must allow individual files to be restored. èUsers must be able to retrieve previous versions of files without the intervention of an administrator. What should you recommend?()

A. Deploy File Server Resource Manger (FSRM). Use Windows Server Backup to perform a daily backup to an external disk.
B. Deploy Windows Automated Installation Kit (Windows AIK). Enable shadow copies for the volumes that contain shared user data. Store the shadow copies on a separate physical disk.
C. Use Windows Server Backup to perform a daily backup to an external disk. Enable shadow copies for the volumes that contain shared user data. Store the shadow copies on a separate physical disk.
D. Use Windows Server Backup to perform a daily backup to a remote network share. Enable shadow copies for the volumes that contain shared user data. Store the shadow copies in the default location.

电阻器的级段电阻,不允许比周围环境温度高过()。如果超过此温度,应增大相对应的级段电阻值或提高整个电阻器的容量。

A. 300℃
B. 350℃
C. 380℃
D. 400℃

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