????:???
?????????????????“??”
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????2??????????2???
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15???????????????????
???:?????????????????
????????????????????!
????!??????????????
?????????5.5%??????1????
??:???????????
???????:????????????
???????????????5??3???
????:2016???62.7???10?5?
??????400?????????????
?????????????????
??WTI????50???????
?????4?1?????????9????
??:“??+????”?????????
????:???????????????
?????????????????????
?????????6.5??????????