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．Cats are easy to care for.B．Cats are soft and beautiful.C．Cats can catch mice.D．All of the above.
A．Cats are easy to care for.
B．Cats are soft and beautiful.
C．Cats can catch mice.
D．All of the above.
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