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Where did they first meet

A．At a ranch.
B．At school.
C．At a party.
D．At a dance.
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In order to apply pesticide spraying precisely, we can use infrared scanning to ______ .
A．estimate the damage to the crops
B．draw a color-coded map
C．measure the size of the affected area
D．locate the problem area
单项选择题
Douglas Spensor
Douglas Spensor
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