电机车的电气制动是(),刚投入时,车速高,需接入()电阻。
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You use Hyper-V Server 2008 R2 and failover clustering to host several virtual machines (VMs). You plan to perform a Volume Shadow Copy (VSS) backup of a Cluster Shared Volume (CSV). You need to ensure that resources can continue to use the CSV during the VSS backup. What should you do?()
A. Turn on redirected access for the CS
B. Turn on maintenance mode for the CS
C. Use Failover Cluster Manager to remove dependencies from your disk resources.
D. Configure your VSS-aware backup utility as a generic application in failover clustering.
患者,男,18岁。医师对其右下肢做肌力检查,先将患者置于坐位,膝关节屈曲90°,再嘱其伸直膝关节,患者不能完成此动作是由于损伤()
A. 髂腰肌
B. 臀大肌
C. 股四头肌
D. 缝匠肌
E. 臀中肌
压缩空气温度过高,会加速气动元件中各种密封件、膜片和软管材料等的老化,且温差过大,元件材料会发生胀裂,降低系统使用寿命。
A. 正确
B. 错误