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若100a=5,10b=2,则2a+b等于( )A.0                           ...
问题详情:若100a=5,10b=2,则2a+b等于()A.0                               B.1C.2                              D.3【回答】B[由100a=5,得2a=lg5,由10b=2,得b=lg2,∴2...
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