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

??

2???7?????,???????A?,????????????

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

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

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

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

(????????????????????? ?? ??? ?)

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

?????????

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

????????