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