职称英语职称英语理工类2003年职称英语等级考试试题理工类C
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The trains on the DLR are controlled by

2024-07-09

A.an on-board central computer.

B.a computer engineer on board.

C.two-way radios operated by the drivers.

D.C.two-way radios operated by the drivers.D.a computer center based somewhere along the lin

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