教育现场观察的特点是什么？
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？（） ["Deploy File Server Resource Manger （FSRM）. Use Windows Server Backup to perform a daily backup to an external disk.","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.","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.","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。 ["300℃","350℃","380℃","400℃"]
婚姻家庭法
管理信息系统的结构可分为五类，即概念结构、功能结构、（）、软硬件结构和（）。
叙述水冷式分块瓦水导轴承润滑油是怎样进行自循环的？
