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2????????

3????????

4??????????

5???????????

??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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