《铁路运输调度规则》规定,在未设出站信号机的到发线上()时,列车调度员不发调度命令。
A、发出列车
B、接触网停电
C、向自动闭塞区间发出列车
D、向次要线路发出列车
参考答案:C
—Does your sister work as a teacher in Canada?
—No, but she once _________there for five years.
A.taught
B.had taught
C.has taught
D.would teach
为什么我的SM扫描不到AVI的文件?