题干
— Could you tell me______ in Yangzhou?
— Of course. I think it's in Dongguan Street.
A：where can we have something good to eat
B：where we can have something good to eat
C：when will the Food Festival be held
D：when the Food Festival will be held
答案(点此获取答案解析）
B
满足 
，其中
， 则这个数列的首项是（ ）