???????????
??????????????????????????????????????????????????1.8?-2.5???????????12000???????
?????????????????????????
??1??????????????
??2???????????????????
??3?????????????????
??4??????????
??5??????????
???????
??1??????????????????TOEFL?????550??IELTS?????6?;
??2???????????????????TOEFL550??IELTS6????????;
??3???????????35????????TOEFL570?IELTS6.5?????????
???? ??????????????????????? ????????????????????????????
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