单项选择题

A．It sends out signals for help.
B．It sounds an alarm to warn the driver.
C．It takes over the driving immediately.
D．It stops the car automatically.
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单项选择题
A．To drive the car automatically.B．To measure the drivers pulse.C．To prevent car accidents.D．To monitor the drivers health.
A．To drive the car automatically.
B．To measure the drivers pulse.
C．To prevent car accidents.
D．To monitor the drivers health.
单项选择题
A．A kind of chart used to keep track of days, months and years.B．A kind of book used to express days of months.C．A list of the animal’s names.D．A list of holidays.
A．A kind of chart used to keep track of days, months and years.
B．A kind of book used to express days of months.
C．A list of the animal’s names.
D．A list of holidays.
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