[判断题]集中联锁区段，本务机车摘挂头、机车出入库、本务机车担当调车机的第一钩作业时，按先问路、后准备进路、再指路的方式调车作业。
A.正确
B.错误

{{B}} A Brief History of Clock
Clocks{{/B}}
At best, historians know that 5,000-6,000 years ago, great civilizations in the Middle East and North Africa started to examine forms of clock-making instead of working with only the monthly and annual calendar. Little is known on exactly how these forms worked or indeed the actual deconstruction of the time, but it has been suggested that the intention was to maximize time available to achieve more as the size of the population grew. Perhaps such future periods of time were intended to benefit the community by allotting specific lengths of time to tasks. Was this the beginning of the working week
{{B}}Sun Clocks{{/B}}
With the disappearance of any ancient civilization, such as the Sumerian culture, knowledge is also lost. Whilst we can only hypothesize on the reasons of why the equivalent to the modern wristwatch was never completed, we kn