车轮端面摆动量，滚动轴承不超过（）mm，圆锥滚柱轴承不超过（）mm。
A.1；2
B.2；1
C.1；3
D.2；3
参考答案：D
--- I’ve been waiting for you for an hour! Where have you been?
--- ______. It’s rush hour now, you know. The traffic is too bad.
A．It doesn’t matter
B．Be careful
C．Sorry about that
D．What a pity
治疗骨折最常用的方法是()。
A．切开复位与内固定
B．手法复位与外固定
C．手法复位与内固定
D．经皮穿针股外固定
E．持续牵引
