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