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全球卫星定位系统英文为：Navigation?Satellite?Time?And?Ranging／Global?Positioning?System，简称()。
A.GPS
B.DGPS
C.NST
D.NSTAR
B.DGPS
C.NST
D.NSTAR
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Most smart phones have （）service capabilities, which means that apps that combine the phone user's location with the availability of retail stores and services can be interwoven into creative mobile business opportunities.
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asB
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