????????????? ????????

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

?????

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

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

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