轨距是钢轨头部踏面下（）mm范围内两股钢轨作用边之间的最小距离。
A.20
B.16
C.10
D.8
参考答案：B
I have ____ you. [ ]
A. something interesting to tell
B. something anything to tell
C. interesting something to tell
D. interesting something tell
对肾盂肾炎的诊断有意义的是（）
A.白细胞管型
B.红细胞管型
C.透明管型
D.蜡样管型
E.上皮细胞管型
