?????????“??????” ???

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

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

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

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