单项选择题

A．Two hours.
B．Four hours.
C．Six hours.
D．Eight hours.
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单项选择题
A．By turning the intensity of sunshine into maps.B．By analyzing the recent weather report.C．By capturing the microwave radiation from the soil.D．By analyzing information provided by ground observation centers.
A．By turning the intensity of sunshine into maps.
B．By analyzing the recent weather report.
C．By capturing the microwave radiation from the soil.
D．By analyzing information provided by ground observation centers.
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