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[单选题]
声呐(SONAR)一词是第二次世界大战期间是由三个英文字母的字头构成的,下列的哪项不属于()。
A.声音(Sound)
B.定位(Localization)
C.导航(Navigation)
D.测距(Ranging)
查看答案
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A.声音(Sound)
B.定位(Localization)
C.导航(Navigation)
D.测距(Ranging)
Upon what creatures is the man-made sonar system based?
A.Bats and dolphins.
B.Frogs and crabs.
C.Crabs and bats.
D.Insects and dolphins.
A.潜标系统
B.浮标系统
C.固定式声呐监视系统
D.拖曳线列阵声呐系统