[单选题]
03.43: The diagram shows yqz(td7xp2pz5 ud k:0two iden6)gtaa8l.lc i jsw1y8 tical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best r) t iwya.l886s1jgc laepresent the electrical potential along the axis?