? ????5.6????????????
??????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???(??) ???:?????????
??
???:????