Had you come five minutes earlier, you()the train to Birmingham. But now you missed it.
A. would catch
B. would have caught
C. could catch
D. should catch
任何单位和个人不得干扰、阻碍事故应急救援、铁路线路开通、列车运行和事故调查处理。
A. 正确
B. 错误
在网时间大于或等于六个月的非实名客户,开通短期国际漫游可用话费余额不少于()元?
A. 200
B. 400
C. 800
D. 1000
PU100螺杆泵维修人员检修后,螺杆泵起动5秒钟后起动柜上黄灯亮,是何故障,该如何处理?