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

2??????????

3???????

4????????

5??????150???

????????2?18????????????????????? (?? ??)?????18?,????????????????????,?“??”,???????,??????“???????????????”?,???????,????????????????

????????????“??”???????,???????????????????????????,?????,???50??(???)??,????????????????500??,??1-3???,????????0.3%-0.5%/??????????,?????????????????????,?,?????,???,????????????

??????????????????,“??”?????????????????????,?????????????????????,????????,???20???(???????)??0.3%/?????????????,20????????0.5%/???????????????????????????????????????????????????????

?????,????????????“?????”????????????20???????(????????)???,??????????????20?????,????,?????????????????????????????????????????????????????????????????????????????????(??) ???????:?????????