车轮直径二级修镟修后限度为815mm；同一转向架车轮直径差限度为（）mm。
参考答案：20
Little _____ about his own health though he was very ill.
A．he cared
B．did he care
C．he cares
D．does he care
C8损伤平面的关键点（）
A.小指
B.拇指
C.枕骨粗隆
D.锁骨上窝
E.肘前窝的尺侧面
