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??????12??19?? ???,???????,??,?????????????????10?,??12~15????????;????,???????0?????????????????????????????????????????????,?????

??,??,???????????????????????????????????????????????????????,???????????????????????????????????????????????????????????3~4??????0??,??,????,??????????

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?19-21???????,??????,????,???????????????????????4~6?,??2~4?,??,????????????????????????6~8?,??10???????????????????????????????????4~5???????,??6~8????

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