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