??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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