??
??:
??????,??????????????:“??????:600??”??????????????????,?????????????????????????????,?????????????,???????????
??:
1.????
“??????:600??”????,?????????????600????????????????,???????????600??????????????,?????????????????,???????????????????????????????
2.????
??“??????:600??”????,?????????????????????,???????;???????????????????????,???????????,?????????????,??????????????????
3.?????????
???“??????:600??”?????,????????????????????????????,????????????????,???600?????????;?????????????,????????????????????
??:
???“??????:600??”????????????,????????????????????????????????????????,?????????????????????????????,???????????????????,?????????????,???????????????????
?????????
???????????:600???????????????????