题目内容

安防系统施工过程中（）阶段性较弱、系统性强、周期长。

A. 电气专业
B. 管道专业
C. 设备专业
D. 土建专业

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Which two statements about queuing mechanisms are true？（）

A. FIFO queuing is only appropriate for slower serial interfaces
B. weighted fair queuing is the default queuing mechanism used for all but slower than E1 rate interfaces
C. only one queuing mechanism type can be applied to an interface
D. weighted fair queuing does not require the configuration of access lists to classify traffic
E. flow-based weighted fair queuing provides for queues to be serviced in a round-robin fashio

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