题目内容

汽车变速器通过换档，可在发动机输出功率不变的情况下（）。

A. 获得不同的速度和牵引力
B. 决定装载货物的多少
C. 减轻司机的劳动强度

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You need to recommend a backup strategy for Hyper-V. What should you recommend？（）

A. Take a snapshot of each VM， and then run a full backup of the Hyper-V hosts by using Windows Server Backup.
B. Shut down the VMs，and then run a full backup of the Hyper-V hosts by using Windows Server Backup. Restart the VMs when the backup is complete.
C. From each VM,run a full backup by using Windows Server Backup， and then run a full backup of the Hyper-V hosts by using Windows Server Backup.
D. From each VM,run a full backup by using Windows Server Backup. Shut down the VMs， and then run a full backup of the Hyper-V hosts by using Windows Server Backup. Restart the VMs when the backup is complete.

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