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单选

热力管道应设有坡度,汽、水同向流动的蒸汽管道和凝结水管道坡度一般为( ),汽、水逆向流动时坡度不得不小于( )。

  • A.0.001,0.002
  • B.0.002,0.003
  • C.0.002,0.005
  • D.0.003,0.005
试题出自试卷《河北省人事考试网高级管道工试题(1)》
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