单项选择题

A．By using satellite images, maps, etc.
B．By studying specific fanning methods.
C．By studying the variation of human population.
D．By analyzing the quality of crops.
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单项选择题
A．25 pence.B．50 pence.C．75 pence.D．95 penc
A．25 pence.
B．50 pence.
C．75 pence.
D．95 penc
单项选择题
A．To estimate the extreme weather.B．To develop the satellite technology.C．To improve agricultural output.D．To learn how to change information to maps more efficiently.
A．To estimate the extreme weather.
B．To develop the satellite technology.
C．To improve agricultural output.
D．To learn how to change information to maps more efficiently.
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