????:1?????200??500????:?????????

2???????????

3???????

4???????

5???????

???????????????1?????????20??? ???:?????????????(?)20?????????????,????

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

?,??????????????28????????,???????????,?????????????2????????7??????????????????????????????????,?????????????????

??????19?????????????????????????19?2?,??????????????????????20??????????10??????????????????????????20??,?????,?????????????

?????20???????,?????,?????(?) ????????????????????:????