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当前学科:高炉配管工(高级)
题目:
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高品位使渣量降到()以下,保高炉强化和大喷煤的必要条件,是获得好的生产技术指标和提高企业经济效益的要求。
A . A.250kg
B . B.300kg
C . C.350kg
D . D.400kg
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