单项选择题

A．To take a break.
B．To make her presentation.
C．To prepare for the presentation.
D．To see her doctor.
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单项选择题
A．To precisely locate the positions of soldiers, weapons and targets.B．To prevent enemy forces from using it to locate US targets.C．To track objects in three dimensions.D．To aid farmers in precision planting and fertilizing,
A．To precisely locate the positions of soldiers, weapons and targets.
B．To prevent enemy forces from using it to locate US targets.
C．To track objects in three dimensions.
D．To aid farmers in precision planting and fertilizing,
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