$9 \cdot 6$ For $a>b>c>0, \quad m>n>0(m, n$ are integers), which of the following relations is correct?
(A) $a^{m} b^{n}>b^{m} c^{n}>c^{n} a^{m}$.
(B) $a^{m} b^{n}>c^{n} a^{m}>b^{n} c^{m}$.
(C) $a^{m} c^{n}>a^{m} b^{n}>b^{n} c^{m}$.
(D) $b^{n} c^{m}>c^{n} a^{m}>a^{m} b^{n}$.
(E) $a^{m} c^{n}>b^{n} c^{m}>a^{m} b^{n}$.
(China Beijing Junior High School Mathematics Competition, 1983)
[Solution] Given $a>b>c>0, m>n>0$, we have
$$
a^{m} c^{n}b>1=c$, then
$$
b^{m} c^{n}=b^{m} \cdot 1^{n}=b^{m}b>c>0, \text{ when } m>n>0$, we have
$$
a^{m} b^{n}>a^{m} c^{n}>b^{m} c^{n}>b^{n} c^{m} \text {. }
$$

Therefore, the answer is $(B)$.