????:1???ly????:??????????

2??????????

3????????????

4?????????

5???24?????600??

?????7??????????????????17????????? ????,??10??(7???????17-26??????),????????????????????????????????????????????,??60~120??,??????150~200??,????300??????;??3~7??,??1~2?????

??:

17-20????,????????????????????????????????????????????????????????????????,???,?????????????????????????????,??,??????????????

21-23??????,???????????????????,???????,???

24??,??????????????

21-24??,?????????????

??

????11-14?????????(7?27-30?????????????),????????????????????????????????????????40~80?????????????????,?????????????????100~150???????

?

1????????

20??,?????21??????????,????,??????????????????????????????,?????????????,????,??

2???????

?????10???????,????????????????????????????????,???????35~39?,?????40??????

3?????????????

???????????????????10????????????,?????????????1~2?,???????1??????

????:??????