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????,16?????17????????,????????????????????????????????4~6?,??8??????????,2????16??????8????17?8????,????????????????????????????????????5~6????????????????????7~8?????;???????????????????????????????????7????????????????8????????????2??16????6?????

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16?????17?,???????????,????,??????,??,?????????????????????????????,???

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2??????????????16??8???????17?8?????????????,??????????????????????????????????????????????????????????????????????????,?????,??????????????????,??(5~9???????)?????????????????????????????????????,???????????,???????????????????????????????????????????????4~6??????????????????????????????????????????????????????????5~7??????????????????

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2?????????????18?????8?????19??8??????,?????????????????????????????????????????????????????,?,???????????????????????????????????????,????,?????????????????????????????,????(25~40????)?????????????????4~5?;?????????????5~7???????

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