【单选题】
在表面式换热器中，冷流体与热流体按相反方向平行流动称为( )。
A. 混合式
B. 逆流式
C. 顺流式
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答案
B
解析
暂无解析
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【简答题】
计算题:4.中和池内现有含HCl 0.1%酸性废液2000m3，欲将其中和，需加入含NaOH 30%的工业烧碱多少立方米?(已知0.1%HCl密度为1.0g/cm3，30%的NaOH密度为1.3g/cm3）
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