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????????????1?????30? ?????????????,30???????,?5.6?????,??21?6.4?????

???????????????,30????????????10?????11?,?5.6??????,?????10??,?5?,?????10?4??????????,??????????3.2???????????4.3????????,?????????

??????????,????????????,??????????,????????????

???,30??10?11???5.2???(?????) ?????????????:?????