--- Did you at the party, Owen?
--- Yes, I was very happy.
A:enjoyed yourself
B:enjoy yourself
C:enjoy yourselves
D:enjoyed himself
东北地区属于亚热带季风气候,冬季寒冷漫长,夏季温暖短暂( )(判断对错)
下图是一位天文摄影爱好者在某地用连续曝光拍摄的北极星空照片,请分析并回答.该照片能证明( )