单项选择题

A．He learned boxing.
B．He raised the level of production.
C．He forgot all about his business.
D．He shook his head all the time.
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单项选择题
A．It monitors the signals transmitted from the driver’s brain.B．It can measure the driver’s alcohol level in the blood.C．It can quicken the driver’s response to emergencies.D．It bases its analysis on the driver’s heart beat.
A．It monitors the signals transmitted from the driver’s brain.
B．It can measure the driver’s alcohol level in the blood.
C．It can quicken the driver’s response to emergencies.
D．It bases its analysis on the driver’s heart beat.
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