?????????????50????????

????:??????????:???92??95?

?9??????????????????????11??????????????????????? (???????????????????? ?????)???10?????????????????,?????????????,?????????????????

?????50???????????(???????,?),??????????????2??????????????3????????????????????????????????5??????????,????????????2????20??????????????????????,3??15???,5?????15?????????????????,2?????????3???????????????????5????2.08%?2.13%??????????2.23%?

????,?,???????????????????????????,??????????????????????????????571.8???????,??11.4?????????????,????????,???????

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