留心观察一天内物体影子长度的变化，从早上到中午再到傍晚，变化规律是（）
A. 短---长----短
B. 长----短-----长
C. 长----再长----更长
D. 短----再短----更短
查看答案
下列选项中，（）为公安机关实行现场管制的必备条件。
A. 实施机关为县级以上公安机关
B. 针对严重危害社会治安秩序的突发事件
C. 事件已造成严重损害后果
D. 经公安机关负责人批准
Certkiller.com has hired you as a system administrator for their network. The previousadministrator created a Microsoft ASP.NET Web application. Microsoft .NET Framework v3.5 wasused to create this application. You detect an unexpected increase in the value of the Application Restarts counter whilstmonitoring the application performance counters. You receive an instruction from management toidentify the reasons for the increase. What should you identify？（）
A. The increase occurred due to changes made to the Web.config file in the system.web sectionfor debugging the application.
B. The increase occurred due to the Microsoft IIS 6.0 host being restarted.
C. The increase occurred due to an additional code fragment that needs recompilation to theASNET Web application.
D. The increase occurred due to the Microsoft Windows Server 2003 that hosts the Webapplication being restarted.
E. The increase occurred due to an additional new assembly in the Bin directory of the application.
F. The increase occurred due to HTTP compression being enabled in the Microsoft IIS 6.0manager for the applicatio
CSMA/CD是载波侦听多路访问/冲突检测的缩写，它是适用于以太网的技术。
A. 正确
B. 错误
当前，对操作系统安全构成威胁的问题主要有（）、（）、（）、（）、（）。
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