?????????????????????????????????20%???????????????????????????????????????????????????????????????????2021??2??12??(???3??)???????·????????????15????1??29??????2021??2??12
??(???3??)?????1??14 ????1??28 ????????2??11??(???)?????????????1??29??????????????????????12306 ???????·12306
???App???綽?????????????????????????????????????????????????? 12306 ???(???????)???????1??14??????????г????????????????????????????????漲??????15 ?????????????????????8 ??(??????)????;7
???????????????48С??????48~24 С???24 С??????????????漲
???;????????????????????????????????;????????????漲
??????????????8??(??)????????????????????;??????????????48С??????????5%???24С??????????48С???????10%???????24С???????20%????????48С???8????????????????????????8????????????г??????????8??????????????5%???????????????????????????????3????????????????????????????????????
?????????????????????????β????5?????λ??β??С??2.5????????2.5?????????С??7.5?????5???7.5??????????1????????????2?????????????Σ?????????????????(1)?????????????????????????????????????????(2)??????????????????????????????t?????????????????????δ????????????????漲?????????????(3)?????t??????????????????????????????????????????????????????3??????г????????????????3?????漲??????????????????·???С??????????????????????????·???????????????Ч???????????????????????????????г?滮????????????????б???????????????????????г????
