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

2???????

3?????600??

4?????

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

??2???7?????????????????????????(????? ???)7?????,????????????????A???????????????,?????????????

7????????????,???????????????????????? ??? ???

???????????????????????????????????,?2?40???????241??????????????????????????????8?A????????

????????,???????????1500?????????????,???????2??16????538?????????“?,???????????,????????,???????????????????????????????”?????,?????????????

??,??????,?????500?1000?????

??,???????????????500??;??????1000??????????;???????????????????????1500???

??:??