题干
假如今天是儿童节，你是怎样度过的呢？去哪里玩了呢？快来写一写吧！
提示：Children's Day, go to the park, many people, play happily, fly a kite, be easy for us, take pictures
答案(点此获取答案解析）
Today is Children's Day. My brother and I go to the park. There are many people in the park. Some girls are playing happily. Some women are taking pictures. My brother and I fly a kite. It is easy for us. We are happy today.
，离心率
，焦点在
轴上的椭圆标准方程是 ( )
