单项选择题

A．The advantages of traditional surveying methods.
B．Using satellites to communicate with mountain climbers.
C．Obtaining new information about a mountain.
D．Controlling satellites from the top of a mountain.
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单项选择题
A．To be an architect.B．To go into the business.C．To be more interesting.D．To become an artist.
A．To be an architect.
B．To go into the business.
C．To be more interesting.
D．To become an artist.
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