To keep the structural integrity of a mechanical system, the horizontal co-ordinate x may be any number, whereas it vertical co-ordinate y must be such that its third power is less than or equal to the numerical value of x. Each of the following pairs satisfies this rule EXCEPT
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A(125,5)
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B(85.3)
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C(57.4)
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D(1,1)
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E(1.0)
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正确答案: C