09b09的精选

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

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

2020-01-26
问题详情： 设a=0.9-0.9,b=0.9则,c=log90.9       则                                                                （   ）A．a>b>c  ...