题干
The couple are spending their holiday on is described as ore of the most beautiful
islands．
islands．
A：what
B：that
C：which
D：where
答案(点此获取答案解析）
A
为椭圆
的两个焦点，过
作椭圆的弦
,若
的周长为16，离心率为
，则椭圆的方程为（ ）
