<img src="/Image1/2c/2c7ae61251a4e21f5d2d77ca2aa37a4a.jpg" />等于下列哪个函数（）？<br>A:<img src="/Image1/a8/a831637ee11dda1dd143dbbcd80fc59d.jpg" />[f（x）+f（x-A.］dx<br>B:<img src="/Image1/a8/a831637ee11dda1dd143dbbcd80fc59d.jpg" />[f（x）+f（a-x）］dx<br>C:<img src="/Image1/a8/a831637ee11dda1dd143dbbcd80fc59d.jpg" />[f（x）-f（a-x）］dx<br>D:D.<img src="/Image1/a8/a831637ee11dda1dd143dbbcd80fc59d.jpg" />[f（x）-f（x-］dx