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2???????

3??????200????

4???????????

5???????

??????12????2???? ?????????,?????????????,????,????????????????????????????????????????????6~8???????,??????9~10?????????,???????????????????????????????6~10???,?????????12~18??????????,??,???????????

?????????,?????????????4~8?,?????,????????????????????,?????????????????????12~16???,???????????,???????????????????????????5~6????7~8??????

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