题干
Chinese officials have set 2020 as the target date by which they aim to________ Shanghai into an international financial center.
A：have anchored
B：have ended up
C：push ahead with
D：have transformed
答案(点此获取答案解析）
D
的焦点为
、
，
为双曲线上一点，
，则双曲线的离心率（ ）