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

????:???????:????????????

?2????????????????????????1????? (?)?,??????1?????????????:2?1???~2?,?,????????????,??

?????????????,?????????2????1?6????8???????????50?????,?????,???????

??,2?1????~2??,????????,?5????????????????????????????????6????,??????,???????????????????,???2??2??~3???????????,???,?5~6??????7???????,??

2?????4????????????,??5~6????7??????,????;2?????5?????????~7????????,???????5??????????????6?????????,????7?,?????,????????,?????????????

????????, 2?1?????~2????????,?????????,???,????????,??2??????????????????2???????~2?3????????,?,?,???????????(?) ??:????????????