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　　其??(qi)二??(er)??，懲??(cheng)罰??(fa)性??(xing)關(guān)??(guan)稅??(shui)政??(zheng)策??(ce)將??(jiang)導(dǎo)??(dao)致??(zhi)全??(quan)球??(qiu)貿(mào)??(mao)易??(yi)成??(cheng)本??(ben)上??(shang)升??(sheng)??，迫??(po)使??(shi)石??(shi)油??(you)貿(mào)??(mao)易??(yi)改?(gai)道??(dao)??，進(jìn)??(jin)一??(yi)步??(bu)加??(jia)劇?(ju)了??(le)國??(guo)際??(ji)油??(you)價??(jia)的??(de)不??(bu)確?(que)定??(ding)性??(xing)??。??美??(mei)國??(guo)對??(dui)進(jìn)??(jin)口?(kou)鋼??(gang)鐵?(tie)和??(he)鋁??(lv)加??(jia)征??(zheng)關(guān)??(guan)稅??(shui)??，增??(zeng)加??(jia)國??(guo)內(nèi)??(nei)石??(shi)油??(you)開??(kai)采??(cai)和??(he)運祝(yun)輸??(shu)的??(de)成??(cheng)本??(ben)??，間??(jian)接??(jie)推?(tui)高?(gao)油??(you)價??(jia)??。同??(tong)時??(shi)??，貿(mào)??(mao)易?(yi)摩??(mo)擦??(ca)導(dǎo)??(dao)致??(zhi)的??(de)全??(quan)球??(qiu)經(jīng)??(jing)濟(jì)??(ji)放?(fang)緩??(huan)預(yù)??(yu)期??(qi)??，又??(you)對??(dui)油??(you)價??(jia)形?(xing)成??(cheng)了??(le)下??(xia)行??(xing)壓??(ya)力??(li)??。這??(zhe)種??(zhong)復(fù)?(fu)雜??(za)的??(de)相??(xiang)互?(hu)作??(zuo)用??(yong)使??(shi)得??(de)國??(guo)際?(ji)油??(you)價??(jia)的?(de)波??(bo)動??(dong)更??(geng)加??(jia)難??(nan)以??(yi)預(yù)??(yu)測??(ce)???！　∑??(qi)三??(san)??，石??(shi)油??(you)輸??(shu)出??(chu)國??(guo)組?(zu)織??(zhi)(歐??(ou)佩??(pei)克??(ke))政??(zheng)策??(ce)調(diào)??(tiao)整?(zheng)存秘(cun)在??(zai)較??(jiao)大??(da)變??(bian)數(shù)??(shu)??。??為??(wei)了??(le)應(yīng)??(ying)對??(dui)美??(mei)關(guān)??(guan)稅??(shui)政?(zheng)策??(ce)帶??(dai)來??(lai)的??(de)不??(bu)確??(que)定??(ding)性??(xing)??，歐??(ou)佩??(pei)克??(ke)和??(he)非??(fei)歐?(ou)佩??(pei)克??(ke)產(chǎn)??(chan)油??(you)國??(guo)也??(ye)在??(zai)積??(ji)極??(ji)謀??(mou)劃??(hua)應(yīng)??(ying)變??(bian)之??(zhi)策??(ce)??。其??(qi)中??(zhong)最??(zui)大??(da)的??(de)政??(zheng)策??(ce)變秘(bian)化??(hua)就??(jiu)是??(shi)宣??(xuan)布??(bu)從??(cong)4月??(yue)起?(qi)取??(qu)消??(xiao)2019年??(nian)開?(kai)始?(shi)實??(shi)施??(shi)的??(de)每?(mei)天??(tian)220萬??(wan)桶??(tong)的??(de)減??(jian)產(chǎn)??(chan)計??(ji)劃??(hua)??，預(yù)??(yu)計??(ji)增?(zeng)加?(jia)的??(de)產(chǎn)??(chan)量??(liang)為??(wei)13.8萬??(wan)桶??(tong)／日??(ri)??。不??(bu)過??(guo)??，這??(zhe)一??(yi)重??(zhong)大??(da)變??(bian)化??(hua)“可??(ke)能??(neng)會??(hui)根?(gen)據(jù)??(ju)市??(shi)場??(chang)情??(qing)況??(kuang)暫??(zan)停??(ting)或??(huo)逆??(ni)轉(zhuǎn)??(zhuan)”??。。