题干
— I am going to study in the USA next year！—________
A：It's a pity.
B：Thanks a lot.
C：Not at all.
D：I hope everything goes well with you.
答案(点此获取答案解析）
D
— I am going to study in the USA next year！—________
A：It's a pity.
B：Thanks a lot.
C：Not at all.
D：I hope everything goes well with you.
上的函数
满足
，
，
，且当
时，有
，则
的值为（ ）
