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题目列表(包括答案和解析)

的值是               (   )

A、5或1   B、5或-1   C、-5或1   D、-5或-1

 

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,,则(    )

A、7         B、-1       C、 7,-1     D、7,-7                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

 

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的值是              (  )
A.5或1B.5或-1C.-5或1D.-5或-1

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,,则(   )
A.7B.-1C.7,-1D.7,-7

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,,则
[     ]
A、7        
B、-1      
C、 7,-1    
D、7,-7

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