题干
It's raining now. I have to go to school .
A：by the car
B：in car
C：in the car
D：by a car
答案(点此获取答案解析）
C
It's raining now. I have to go to school .
A：by the car
B：in car
C：in the car
D：by a car
的左焦点F。右顶点A，上顶点B，若
，则椭圆的离心率是（ ）
