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

2???????

3?????5??93?

4???????

5???????

??,?????????????????????????????????50%???80%?

9????????????28??,????????????,????,??,?????

??????????????,??,??????????????1000????1200?????,?????????????????????????????????????????,?D?????????????,????????????

?????????????????,?????,???(??? ????????????????? ??????????????????????????????? ?????????)

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