???? ????????????5.6?

????????1?30????????????? ???,30????????????,?????5.6??,??????????21??????????6.4??????

??????????????????????,30??????????10??????11?,?5.6????????????,??????????10?,??5?,?????10??4?????,????3.2?4.3?????,??

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??,30??10?11???????5.2?????????????(????) ??:???????????