To keep children away from danger,we warn parents ________ children at home alone.
A:leave
B:to leave
C:not leave
D:not to leave
如图所示,已知A( 12 ,y1),B(2,y2)为反比例函数y= 1x 图象上的两点,动点P(x,0)在x轴正半轴上运动,当线段AP与线段BP之差达到最大时,点P的坐标是( )