题干
——Are you going to Jim’s birthday party tomorrow?
——No. Unless I ________.
A：am not invited
B：wasn’t invited
C：am invited
D：will be invited
答案(点此获取答案解析）
C
——Are you going to Jim’s birthday party tomorrow?
——No. Unless I ________.
A：am not invited
B：wasn’t invited
C：am invited
D：will be invited
、
是椭圆
的两个焦点，
为椭圆上一点，且∠
，则Δ
的面积为（ ）