3．跌水的形成条件是（）。 - 查题网

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国家开放大学 / 流体力学

3．跌水的形成条件是（）。

A.
从缓流过渡到缓流

B.
从缓流过渡到急流

C.
从急流过渡到缓流

D.
从急流过渡到急流

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流体力学

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