设a=0.9-0.9,b=0.9则,c=log90.9       则                   ...

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 设a=0.9-0.9, b=0.9 设a=0.9-0.9,b=0.9则,c=log90.9       则                   ...则 ,c=log90.9        则                                                                 (    )

A.a>b>c             B.  b>a>c          C.a>c>b           D. c>a>b

【回答】

知识点:基本初等函数I

题型:选择题

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