第三章测试1.Underwater acoustic communication is the main means of underwater communication（ ）
A:错 B:对
答案:B
2.There are two types of seabed observation systems: mooring free buoy system and mooring observation network system（ ）
A:错 B:对 3.GPS navigation is an autonomous navigation error（ ）
A:对 B:错 4.Ocean matching navigation belongs to autonomous navigation（ ）
A:对 B:错 5.Synthetic Aperture Radar is abbreviated as SAR（ ）
A:错 B:对
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