【单选题】Lesson 15 词汇拓展-词汇选择-3 ADSB equipment can be installed in areas to improve traffic visibility where there is no or poor radar _______A．coverageB．infrastructureC．antennaD．density
【单选题】Lesson 15 词汇拓展-词汇选择-3 ADSB equipment can be installed in areas to improve traffic visibility where there is no or poor radar _______
A．coverage
B．infrastructure
C．antenna
D．density
参考答案和解析
originated
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