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

2???????

3??????????

4???????

5????????

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

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

???:

1.?;

2.?????;

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

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