题干
That white car is not ___________. It is ____________.
A：Jack's; my
B：Jack's; mine
C：Jack; mine
D：Jack; my
答案(点此获取答案解析）
B
That white car is not ___________. It is ____________.
A：Jack's; my
B：Jack's; mine
C：Jack; mine
D：Jack; my
的公差为2,若
成等比数列, 则
= （ ）