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

2????????

3???98???

4??????????

5????????????

????2?????????????19??????????????????? ??????????,??????????????,??????????????????????????????????,????;?????;????????????????????,??????????32.6???????????

????????,??????,???????????10~30????,???????????????40~70??,???????????90???

????,???????,????????????,???????,???????????????;???????????????????????????????,???????,??????????

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

?,???????,???????????????????????,??;?????????????????????,???????

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