??
?????1????30? ?,30???,??5.6????????????,????????????21??????6.4??????
???????????????????,30??????????10??????????11?,?5.6????????,????????10?,??????????5?,???????????????10??4?,???3.2???4.3?????,???????????
?????,??????????????????,??,??????
?????????????,30???????????10??11?5.2???????(????) ??:??
?????????
????????????????? ????5.6??????????????