幸福XF250摩托车有（）个档位。
A.2
B.3
C.4
D.5
参考答案：D
扩展GSM900频段的整个上行工作频率为（）。
He meant that you are old your age _______ saying “the guy is overgrowing”.
A．for, by
B．for, as to
C．with, about
D．to, by
