??????????????
??
- ??????????????????????
??
- ????????????????????
????1?????γ?
?????????????б????????70%??
???????????2???????????6.0??3???????????5.5???и?IBT46??
????2??????
?????????????б????????70%?????????????????????????
?????????????????6.0??????????5.5???и?iBT60??
????3????
???????????λ?λ?????????70+??
?????????????????6.0??????????6.0???и?iBT78???????????20??