?????2???????12?? (???????? ???????)12??,??,??????????/????106.96???,??????64.29??,????????171.25?????????/?159.98???????????/????
?????????????????????????????????????
??:??????
4S??????????????:????????
???:?????????????????
????????????
??WTI????50???????
??????:??????????????
?????????????????????
????????6???????????
?????????????????????
??????????????????????????
?????????5.5%??????1????
?????????6?????4?
?????????????????????
???:?????????????????
??:??????“??”???????
?????????????:????????
??????????????:??7????
?????????6?????4?
?????????????????
???:??????????????????
????????????????:????????
????:????????????????????
???????????:?????????
??????????????????????????
????!??????????????
?????????6?????4?