函数的定义域是   A.B.  C.D.                                   ...

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函数的定义域是   A.B.  C.D.                                   ...

函数的定义域是

    A. B.    C. D.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

【回答】

C

知识点:基本初等函数I

题型:选择题

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