--- Did you at the party, Owen?
--- Yes, I was very happy.
A:enjoyed yourself
B:enjoy yourself
C:enjoy yourselves
D:enjoyed himself
已知椭圆C:x2a2+y2b2=1(a>b>0)的离心率为63,焦距为22,过点D(1,0)且不过点E(2,1)的直线l与椭圆C交于A,B两点,直线AE与直线x=3交于点M.
(1)求椭圆C的标准方程;
(2)若AB垂直于x轴,求直线MB的斜率。
鸟类的生殖和发育过程,一般包括____、____筑巢、产卵、____和育雏等几个阶段.
酒驾、醉驾易造成伤害事故,其主要原因是酒精( )