??????????????
??
- ?????????????????????о???????Щ??????
??
- ?????????????????????????о?????????
??????????
????1?????????????????????λ????????????????
???????????
????1????????????6.5???????????6.0???
????2??PTE(?????58????????????????58???
????3???и????????570???д????????5????и?????????230???д????????5????и?????????90???????????20???
????4?????????