热态效验（）时，当压力超过工作压力时，工作人员应站远些以防以防蒸汽喷出伤人。
A. 安全阀
B. 调节阀
C. 截止阀
D. 闸板阀
查看答案
Which QoS mechanisms can you use on a converged network to improve VoIP quality？（）
A. The use of a queuing method that will give VoIP traffic strict priority over other traffic
B. The use of RTP header compression for the VoIP traffic
C. The proper classification and marking of the traffic as close to the source as possible
D. The use of 802.1QinQ trunking for VoIP traffic
E. The use of WRED
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