6??8???????? ??????????9~10?

??2?????6????????????????? ???,???????(2??????????5??????),?????????????????????????????????????????????????????????????????7~9??,???????10~13?????????,????????????????????????????????

6????????????8?????????,?,???????????????????????????????????

??????,???6~8?,???????????????????10???????????;????4~6?,?7~8?,??10??????????????8??,??0???????????,????????8~10?,????????????????12??????

??,?????????????,??????4~6?????7~8????????,??,????????????9~10?????????;????7~8????????9~11?????6???

6????7??,??,????????????????????,6??????????7??????,???,??????;??????

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