????:1????????:????QQ?

2???????

3?????????????

4????????

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

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

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

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