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