提速货物列车中的铁路货车车轮踏面擦伤及凹下深度须≤()mm。
A、0.5
B、0.6
C、0.8
D、1.0
参考答案:A
Mr. Wang is so friendly to his students that he is__________ their friend.
A dressed up B regarded as C looked like D looked at
公安机关的任务是指公安机关在国家法律所确定的管辖范围内,为实现一定的目标所进行的工作内容。 ( )