将函数的图象向左平移个单位后得到函数的图象,则(      ) A

将函数的图象向左平移个单位后得到函数的图象,则     

A为奇函数,在上单调递減     B最大值为1,图象关于轴对称

C周期为,图象关于点对称  D为偶函数,在上单调递增

答案

B

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