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 国家开放大学 / 流体力学

2.总水头线与测压管水头线的基本规律是:(  )


A.
测压管水头线总是沿程下降的

B.
总水头线总是在测压管水头线的上方

C.
总水头线总是沿程下降的

D.
测压管水头线沿程可升可降
  积分
 参考答案:
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