陇海铁路分别在徐州、郑州与下列哪条铁路线相交
A:京广线、京沪线
B:京沪线、京哈线
C:京广线、京九线
D:焦柳线、宝成线
Travelling to London
We think ⑴ is the best season to visit England.
We did most of our sightseeing(观光) ⑵ .
The best part of the trip was going to the theatre.
We don't think the English food is very ⑶ .
设F1,F2是椭圆 x24+y2b2=1 (0<b<2)的左、右焦点,过F1的直线l交椭圆于A,B两点,若|AF2|+|BF2|最大值为5,则椭圆的离心率为( )