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

2?????????

3????????

4???????

5???????

?????????????1????????27? ?????????????,???????1??27?10?:

??????????,1????27?14??1????28??14??????,??????????????????,?????(20~25???????);?5~15??,??????????????????????15??????

????:??

??????:

1.???????????;

2.????????????????????????????????????????,???????????;

3.??,??,???????????????;

4.?,??????????;

5.??

?????????:???????????