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

2?????300??400

3????????

4????????

5??????????

??????8??20????? (??? ?????)20??????,???“?”??????????????????????????????????????????????????????????????????????????????????????????????????????????10??400?,??????????100????????

???,???“????????????????????,???????”???,???????????????????????,?????,????????????????????????????

????????2????,??,????????????????3??,??????,???????????????60??????60??????90????????????????,?????????????????????????????????????????????????????????

20???????,????“????????????”?,????????

???,????????????,???

???????,??5?,???????3??,?65?,2000??????????(??????)

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