热力管道应设有坡度,汽水同向流动的蒸汽管道坡度一般为(  ),汽水逆向流动时坡度不得小于(  )。热水管道应有不小于(  )的坡度,坡向放水装置。

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问题 热力管道应设有坡度,汽水同向流动的蒸汽管道坡度一般为(  ),汽水逆向流动时坡度不得小于(  )。热水管道应有不小于(  )的坡度,坡向放水装置。

选项 A、0.003,0.002,0.005
B、0.002,0.005,0.003
C、0.005,0.003,0.002
D、0.003,0.005,0.002

答案D

解析
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