单项选择题

In order to apply pesticide spraying precisely, we can use infrared scanning to ______. ( )

A．locate the problem areas
B．drew a color-coded map
C．measure the size of the affected area
D．estimate the damage to the crops
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单项选择题
The application of infrared scanning technolgy to agriculture met with some difficulties due to ______.( )
A．the lack of official support
B．its high cost
C．its failure to help increase production
D．the lack of financial support
单项选择题
Infrared scanning technology may be brought back into operation because of ______. ( )
A．growing concern about the excessive use of pesticides on crops
B．the desire of farmers to improve the quality of their produce
C．the forceful promotion by the Department of Agriculture
D．full support from agricultural experts
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