WD-320稳定车的稳定装置工作(),需向加轨钳销轴和夹轨油缸的销轴处加注润滑油。
A、50h
B、100h
C、150h
D、200h
参考答案:A
.Being examined twice a year is the rule that every driver obey in the city .
A.shall
B.can
C.ought to
D.need
Humanists argue that human history is marked by a continuous conflict between scientific and technological ingenuity and the demands of the spirit.
A. noted by B. conformed withC. certified by D. characterized by