已知是R上的偶函数，若将的图象向左平移一个单位后，则得到一个

已知是R上的偶函数，若将的图象向左平移一个单位后，则得到一个奇函数的图象，若

A 503 B 2012 C 0 D -2012

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已知是R上的偶函数，若将的图象向左平移一个单位后，则得到一个

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