万用表是测量通信设备和线路绝缘电阻的仪表。
A. 正确
B. 错误
CRTSⅡ型板式无砟轨道，标准轨道板长度为（）mm。
A. 6450
B. 4962
C. 2550
D. 2400
You have a secured Windows Communication Foundation (WCF) service. You need to track unsuccessful attempts to access the service. What should you do?（）
A. Set the authorization Manager Type attribute of the service Authorization behavior to Message.
B. Set the include Exception Detailsln Faults attribute of the service Debug behavior to true.
C. Set the Mode attribute of the security configuration element to Message.
D. Set the message Authentication AuditLevel attribute of the service Security Audit behavior to Failure.
在编辑漫游时，漫游总帧数为600，帧/秒为15，关键帧为5，将第5帧的加速器修改由1修改为5，其总时间是（）。
A. 40s
B. 20s
C. 60s
D. 50
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