持通票的旅客在中转站和列车上要求变更径路时,必须在客票有效期能够到达到站时方可办理。
Which two statements best describe spanning-tree BPDU processing for a blocking port?() ["BPDUs that enter a blocking port are discarded.","BPDUs that enter a blocking port are processed.","Loopguard puts an interface into a loop-inconsistent state when BPDUs stop being received on a blocking port.","BPDUs are only processed on forwarding ports."]
用于制作透析膜的材料所应具有的特点是什么?
旅客丢失车票应另行购票。在列车上应从列车始发站起补收票价,核收手续费
文学概论理论认为文学艺术创作的唯一源泉是:() ["想象","怀疑","书籍","生活"]
影响商业银行收益率的主要因素。