Which of the following is equal to the cube of a non-integer?

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问题 Which of the following is equal to the cube of a non-integer?

选项 A、-64
B、-1
C、8
D、9
E、27

答案D

解析 Of the answer choices, only 9 is not a "perfect" cube, which means that its cube root is a non-integer.

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