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