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2??????vx

3???????

4???????????ktv

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

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

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

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