??
??????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???????,??????????????????????
??,?????????????,????????????,??????,??????????????????????,??,??,???????????????????????,????????,??,???????????????,???????
?????:????????????
?????????????????? ???????? ?????????????