【判断题】Block systemis a kind of train operation,whichmeans when a section isoccupied by a train and no other train is allowed to use that section until the proceeding train has traversed that section.
【简答题】Refer to your textbook(p39-40). Please write down your answers in the given blanks. The answer to 1. Section A is _____. The answer to 2. Section A is _____. The answer to 3. Section A is _____. The a...