单项选择题

A．To drive the car automatically.
B．To measure the driver’s pulse.
C．To prevent car accidents.
D．To monitor the driver’s health.
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单项选择题
A．Explaining the campus architecture to visitors. B．Providing guidance for new campus employees. C．Familiarizing new students with the campus. D．Advising students which classes to take.
A．Explaining the campus architecture to visitors.
B．Providing guidance for new campus employees.
C．Familiarizing new students with the campus.
D．Advising students which classes to take.
单项选择题
A．They were common in the U.S., but not in Europe. B．Only a few people had them. C．People considered them essential. D．They were not very accurate.
A．They were common in the U.S., but not in Europe.
B．Only a few people had them.
C．People considered them essential.
D．They were not very accurate.
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