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?????????2????????????????7???? ?????,????(2????6??????),?????,?????????????????????????????????????????????????6~8?????????,??????9~13?????;??????????????????????????????????????????????8??8????????????,??????????????????????????6~8?????????????,??????12~16???????????,?????

??????(7??8?),????,???6~8???,????????????10???????????;??4~6?,????8~10?,?????????????????10????????????????????

???????????,7??,??????????5~6?????????????????7~8????,?,????????9~10??;?????????????????????????????????????????????????9????????????????????10~11??????????8??,??,???

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7????,??????,??????????????

???,7???????8?????,?????????,??????????;????????????????????,??????7????,??????

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