12.已知.若 = ( ) A.2006 B.4 C. D.-4 查看更多

 

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已知

=                                                     

A.2006                      B.4                            C.                         D.-4

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(09年莱芜二中诊断一理)已知,若=                                                                           (    )

       A.2006                   B.4                        C.                      D.-4

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