已知( ) A. B. C. D.- 查看更多

 

題目列表(包括答案和解析)

已知=                                        

A.                       B.-                    C.                       D.-

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已知=                                  

A.2                            B.-2                        C.                       D.

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已知                                 

A.7                            B.                          C.-                      D.-7

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已知=                                         

A.m                           B.-m                        C.               D.-

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已知=                                                                 

A.m                           B.-m                        C.               D.-

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