题干
P. E. is my favorite subject __________ it's interesting.
A：or
B：and
C：but
D：because
答案(点此获取答案解析）
D
P. E. is my favorite subject __________ it's interesting.
A：or
B：and
C：but
D：because
，离心率
，焦点在
轴上的椭圆标准方程是 ( )
