Track circuits detect__1__if a train is occupying a block.
检测
举一反三
- block signal A: a fixed signal that lets engineers know if a train can enter a block. B: a conductive connector used to maintain circuit continuity for track circuits and electrified tracks.
- manual block A: block controlled manually by a person known as a block operator. B: a fixed signal that lets engineers know if a train can enter a block.
- a fixed signal that lets engineers know if a train can enter a block. A: ABS (automatic block system) B: lock C: lock signal
- A _______ line is a track used exclusively for a high-speed train. A: train B: track C: welded D: dedicated
- A rate is a ______. A: speed B: train C: fast D: track
内容
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2. Only one train is permitted in each block at a time.
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is force exerted horizontally on the track as a train passes. A: lateral stress B: horizontal curve C: compromise figure
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Choose the correct word for the definition: a person who operates a train A: locomotive enginee B: conducto C: track labore
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Translate the following sentences into Chinese.Signals designate when a train may occupy a main track, and when it should move to a secondary track.
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A（）is a named momory block . By using its name, we can refer to the data stored in the memory block. A: word B: record C: program D: variable