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????:?????????998??:??????????

?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??????,??????,???????