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A-B =2^55-3^33 =(2^5)^11-(3^3)^11 =32^11-27^11>0 所以A>B B-C =3^33-5^22 =(3^3)^11-(5^2)^11 =27^11-25^11>0 所以B>C 所以A>B>C
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