You manage several computers that run Windows 7. A user wants to roll back a driver. The user opens thedevice properties in Device Manager and discovers that the Roll Back Driver option is unavailable. Youconnect to the computer by using Windows Remote Assistance. You need to roll back the driver to itsprevious version. What should you do first?（）
Add the user to the Power Users group.
B. Right-click Device Manager and select Run as administrator.
C. From System Properties， modify Device Installation Settings.
D. From the Local Group Policy， modify Device Installation Restrictions.
查看答案
Rescue and Recovery包括简化版和高级版。
A. 正确
B. 错误
下列关于吊杆装置和吊杆式起重机的试验描述不正确的有（）。 Ⅰ每根吊杆应按规定的试验负荷进行试验； Ⅱ试验程序或大纲应经船东同意； Ⅲ试验所使用的配重物应有质量证明； Ⅳ试验时，吊货杆应放置在可能使用的仰角位置。
A. Ⅰ、Ⅲ
B. Ⅱ、Ⅳ
C. Ⅰ、Ⅱ
D. Ⅲ、Ⅳ
采煤机上必须装有能停止和开动刮板运输机的控制装置（）
A. 正确
B. 错误
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