A:提出猜想
B:数学推理
C:实验检验
D:合理外推
已知A,B分别为椭圆x2a2+y2b2=1a>b>0的左、右顶点,点C(0,b),直线l:x=2a与轴交于点D,与直线AC交于点P.若∠DBP=60°,则该椭圆的离心率为( )
— How far is your cousin's home from here?— It's about two ______ drive.