????:1???????:?????????????

2?????90????????

3?????????????

4?????

5????????

????????????2??2??? ??????????????????,??????2?????????????????????1?,??????????1??????????31???????????????????,??????????,??????????????19??

?????????:??????,???????1??????????????????????????????????31????,?????????,????????????????

??????????????????????????????????,??2???1???????,??????????,??

??????????,??????1?31?????,?????,??????????????,??????

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

???,??????????2??????????1??????,???????????????????????????????,?????

??:????