Which two statements best describe spanning-tree BPDU processing for a blocking port?()
A. BPDUs that enter a blocking port are discarded.
BPDUs that enter a blocking port are processed.
C. Loopguard puts an interface into a loop-inconsistent state when BPDUs stop being received on a blocking port.
D. BPDUs are only processed on forwarding ports.
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下面遗产取得的方式中,()不是法律规定的遗产继承方式。
A. 法定继承
B. 遗嘱继承
C. 财产遗赠
D. 代位继承
利用移动平均法测定长期趋势时,一般来说,移动平均的项数越多,移动平均数的跨越时间就越(),所揭示的长期趋势也就越()。
我国煤炭市场长期交易比重过大,不利于煤炭价格的稳定。
A. 正确
B. 错误