单项选择题

The trains on the DLR are controlled by

A．an on-board central computer.
B．a computer engineer on board.
C．two-way radios operated by the drivers.
D．a computer center based somewhere along the line.

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热门试题

单项选择题

Thousands of Irish people starved during the Potato Famine because

A．they were so dependent on potatoes that they refused to eat anything else.
B．they were forced to leave their homeland and move to America.
C．the weather conditions in Ireland were not suitable for growing potatoes.
D．the potato harvest was bad.

单项选择题

The passage tells us that London's first Light Rail System

A．was constructed in the nineteenth century.
B．will be finished in three years' time.
C．follows some of the original lines.
D．took three years longer than expected to complete.