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Third, the analysis of activity base cost of oil & gas enterprises.
三是油气田企业的作业成本分析；
youdao
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Activity of acid catalyst was higher than that of base catalyst.
酸催化比碱催化具有更高的反应活性。
youdao
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Activity of acid catalyst was higher than that of base catalyst.
酸催化比碱催化具有更高的反应活性。
youdao