If m > 0 and n > 0, which of the following is equivalent to fff\((n\frac{m}{{m}^...【小站备考】

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If m > 0 and n > 0, which of the following is equivalent to

$(n\frac{m}{{m}^{2}})\sqrt{\frac{m^{2}}{n}}$ ?

A. $\sqrt{n}$

B. $n\frac{m}{\sqrt{n}}$

C. $\frac{m^2}{n}$

D. $\frac{n^2}{m}$

E. ${\frac{1}{n}}m$

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