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【单选题】
“全球定位系统”又称 ( ) 是一个由 24 颗卫星组成的星座,它可以对地球上任何地点进行精确定位。用户可用一个很小的接收器接收到 4 颗 GPS 卫星上的信号并计算出位置数据,
A.
探测地点
B.
导航
C.
探测方向
D.
测量位置
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