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