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

2???????????

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

4????????

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

?1??21?????????? ??????????????,21?????????17???????????,????????????????6.4???????????????????????????????????????,???????????27??????,????????????

?????,????????11?????????????????????????????,??55???????????????,???????5??

???????????????,??,???,?????,???????????????,?????,???4????10??????????

????????????,???????10???????????????,????????????????22?????????????????,???????????????????????????

???????????????????,????????,?????21???,??????????????????,???,?,???(?????????????????) ??????:????