?? ???????????????
????:1???????:????????
2???????
3?????????
4?????????
5??????
????1???????????????27??????????? ????,?1??????27???6?:
??1???????????27?????????????????8?28?8?????????????,???????????????????,??,?(20~26??????);?????5~10?????,??????????15???
??????????:?????????????:
1.???????;
2.?????????????????????????????????????,?;
3.??????????????????????,??,????;
4.????,????????;
5.??????????????
????:??