?6.4??27???? ???????????

????????????????1?21????????????????????????????? ??,21??????????????17??,??????????????????6.4???????,???????27????????,???

???????????????,??????????????????11??,????55???????????,????????5?????????????????

????????????????????????,?????????,???????????????????????????????????,?????????,?????,?????????,???4?????10????????

????,??????10???????,?????22?????????????????????????????????????????,??????????

?????,?????????????????,??????21????,???,?????,???,?????????(??????????) ????????????????:??