高速压缩机一般采用的润滑方式是()。
A.飞溅润滑
B.人工润滑
C.强制润滑
D.被动润滑
参考答案:C
Professor Williams keeps telling his students that the future _____ to the well-educated. [ ]
A. belongs
B. is belonged
C. is belonging
D. will be belonged
线路动态不平顺是指线路不平顺的动态反映,主要通过()进行检测。
A.综合检测列车
B.轨道检查仪
C.轨道测量仪
D.道尺