???????????????

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

??6???????????16???????? ???,???????6??16?18????:?17????,???????????????????????????????????????????????????????????????????????????????????????????35~36???????????,??,???????????????????????????????????37~39?,?????????40????????????

??18??,???????????????????????????????????????????????????????37~39??????,????40?????

?:

1.?????;

2.???;

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

4.??????? ??????:?????