单项选择题

A．They can perform different tasks.
B．They are easy to reprogram.
C．They increase productivity.
D．They perform a single operation at a time.
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单项选择题
A．Weekend plan.B．Changes in the city.C．Going camping in the summer.D．Life in the summer.
A．Weekend plan.
B．Changes in the city.
C．Going camping in the summer.
D．Life in the summer.
单项选择题
A．To earn money for school.B．To keep his family’s yard looking nice.C．To he able to work outdoors.D．To get exercise while working.
A．To earn money for school.
B．To keep his family’s yard looking nice.
C．To he able to work outdoors.
D．To get exercise while working.
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