欧拉数Eu代表的是______之比。 A．惯性力与压力；B．惯性力与重力；C．惯性力与表面张力；D

欧拉数E_u代表的是______之比。

A．惯性力与压力；B．惯性力与重力；C．惯性力与表面张力；D．惯性力与黏性力。

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