单项选择题

A．Security.
B．Engine.
C．The "tyre war".
D．Deaths and accidents.
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allegory
单项选择题
A．further actions to force speeds upB．further actions to force speeds downC．no further actions to force speeds upD．no further actions to force speeds down
A．further actions to force speeds up
B．further actions to force speeds down
C．no further actions to force speeds up
D．no further actions to force speeds down
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