在其他条件相同的情况下，钢筋混凝土框架结构的伸缩缝最大间距比钢筋棍凝土剪力墙结构的()。
A．大
B．小
C．相同
D．不能肯定
参考答案：A
--- Tom , why didn’t you answer my call yesterday afternoon?
--- Sorry , I didn't hear the phone . I ___________ asleep.
A．must be
B．must have been
C．could be
D．should have been
调和平均数
