?? “2+4+3”?????????????
????:1?????Xj??FG:???????????
2???????????????
3?????????
4???????
5??????????
1??22????,????????
??“????”??,??????????????????????????????????????????“2+4+3”???????????“2”????????????,“4”?????????????????????????????????????,“3”???????????????????????????
??????????,???????;??,??????????1300?,5800??,??????????????????????????????????,??????????,?????????“???????????????????????”?????????????,???????????????????????,???????????(?????? ??????)
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