什么叫电力系统的稳态和暂态？
Refer to the exhibit. What is the effect on the trust boundary of configuring the command mls qos trust cos on the switch port that is connected to the IP phone？（） Effectively the trust boundary has been moved to the IP phone。 The host is now establishing the CoS value and has effectively become the trust boundary。 The switch is rewriting packets it receives from the IP phone and determining the CoS value。 The switch will no longer tag incoming voice packets and will trust the distribution layer switch to set the CoS。 RTP will be used to negotiate a CoS value based upon bandwidth utilization on the link。
欧洲的好战性在一定程度上导致了现在欧洲的国家林立的局面。
营养物质中的三种重要供热有机物是（）、蛋白质和油脂。
流感病毒的主要传播途径（） 呼吸道传播。 消化道传播。 血液传播。 垂直传播。
下列情况中，会导致往复泵抽空的是（）
