当ADIRU失去交流电时，LADIRU能工作多长时间（）
A. 20分钟
B. 30分钟
C. 40分钟
D. 工作到电瓶电压低于18V为止
Your company has an Active Directory forest that contains client computers that run Windows Vista and Windows XP. You need to ensure that users are able to install approved application updates on their computers. Which two actions should you perform（）
A. Set up Automatic Updates through Control Panel on the client computers.
B. Create a GPO and link it to the Domain Controllers organizational unit. Configure the GPO to automatically search for updates on the Microsoft Update site.
Create a GPO and link it to the domain. Configure the GPO to direct the client computers to the Windows Server Update Services （WSUS） server for approved updates.
D. Install the Windows Server Update Services （WSUS）. Configure the server to search for new updates on the Internet. Approve all required updates.
计量检定的依据是什么？计量检定规程有哪几种？各自适合什么范围？
下列关于经由道路运输民用爆炸物品应当遵守的规定说法中错误的是（）
A. 应携带《民用爆炸物品运输许可证》
B. 民用爆炸物品的装载符合国家有关标准和规范，车厢内除押运人员外不得载人
C. 运输车辆应按照规定悬挂或者安装符合国家标准的易燃易爆危险物品警示标志
D. 运输民用爆炸物品的车辆应当保持安全车速
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