The dog _______ played with you just now is _______.
A:which; mine
B:which; my
C:what; mine
D:what; my
已知焦点在x轴上的椭圆x2a2+y2b2=1(a>b>0),焦距为23,长轴长为4.求椭圆的标准方程;
朱——____——____ 台——____——____
骨——____——____ 昔——____——____