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