火灾探测器的敏感元件的作用是将火灾特征的物理量转换成（）。
A. 光信号
B. 声音
C. 电信号
D. 声、光信号
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健身跑可以提高人的耐久力，能使人长时间坚持工作而不宜疲劳。
A. 正确
B. 错误
You work as an administrator at ABC.com.The ABC.com network consists of a single domain named ABC.com.All servers in the ABC.com domain have Windows Server 2012 R2 installed. A ABC.com server named ABC_SR12 hosts a virtual machine named ABC_VT02. A ABC.com user named RoyAllen must be allowed to manage ABC_VT02.Which of the following options will allow RoyAllen to complete his duties without giving him too much permissions？（）
A. You should make RoyAllen a member of the Power Users group.
B. You should make RoyAllen a member of the Local Administrators group on ABC_VT02.
C. You should make RoyAllen a member of the Local Administrators group on ABC_SR12.
D. You should make RoyAllen a member of the Hyper-V Administrators group.
E. You should make RoyAllen a member of the Creator Owner group on ABC_VT02.
F. You should assign RoyAllen the Allow log on locally permission to ABC_VT02.
G. You should run the Delegation of Control Wizard on ABC_VT02.
根据列车车次判断列车种类，L788次是（）列车。
A. 临时旅客
B. 旅游
C. 回送客车底
D. 行包快运
空气中毒物浓度很高或含氧量在以下16%的作业场所，必须戴好（）
A. 过滤式防毒面具
B. 隔离式防毒面具
C. 正压空气呼吸器
D. 防毒口罩
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