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

2???????

3???????

4?????600??

5???100????

?12???????28?(?????????????????????? ?????)28???????????,“???2000”???????????,?????????????

12???28??,????????????,“??2000”????

“????????????????????2000”?,?????????????136??????53????10??????,?????????????????8?,?????????????????,?80?????

????,??????2000???,????????????20?,??????

????,?,?95%,???????????????????????????(????)

??????:???