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【单选题】
转炉脱碳速度的变化规律是由于（）A.
铁水碳含量由高变低；所以脱碳速度也由高变低
B.
炉内温度和碳含量的变化，其脱碳速度是低→高→低变化
C.
熔池温度由低→高，碳氧反应是放热反应，故脱碳速度由高→低变化
D.
铁水碳含量由高变低，而脱碳速度由低→高
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皮皮学刷刷变学霸
举一反三
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