????:1??????????:????90????????

2????????

3?????????

4?????

5???????????

?????????2???7????? (????? ????????)??????????7???

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

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

??????????,??????????,???????????,??,?????,????????????????????,?????????,???????????????????????????????????,?????,???,?????????????????????????,?????????????5?????????,???(????????) ??:????????????