??2???15? ??(USGS)??,???14????,?(?31.66????,???104.18?????????)???5.0????,??6.6?????????
???:???
??WTI????50???????
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?????268???????:???????
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MLB??????????:?????????
????:2016???147??10?10?
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?????????5.5%??????1????
????:2016???62.7???10?5?
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