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