19.抛物线y2=2px(p>0)的焦点为F,过点M(p,0),倾斜角为45°的直线与抛物线交于A、B两点,若|AF|+|BF|=10,则抛物线的准线方程为( )
0 229672 229680 229686 229690 229696 229698 229702 229708 229710 229716 229722 229726 229728 229732 229738 229740 229746 229750 229752 229756 229758 229762 229764 229766 229767 229768 229770 229771 229772 229774 229776 229780 229782 229786 229788 229792 229798 229800 229806 229810 229812 229816 229822 229828 229830 229836 229840 229842 229848 229852 229858 229866 266669
| A. | x+1=0 | B. | 2x+1=0 | C. | 2x+3=0 | D. | 4x+3=0 |