已知有公共焦点的椭圆与双曲线中心为原点,焦点在轴上,左右焦点分别为,且它们在第一象限的交点为P,是以为底边的等腰三角形.若,双曲线的离心率的取值范围为.则该椭圆的离心率的取值范围是
If we continue to pull ,I believe we can solve the problem soon.
We are not expected (arrive)late when we have a meeting
The boy could dress (he)at the age of four.
Everyone thinks he is a (luck)dog.
It's (say)that the pianist will come to our city next week.