28. _____ means the echo generated, e.g. by a vessel, on a radar screen.(依據IMO
SMCP)
(A) Shadow
(B) Target
(C) Image
(D) Picture
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統計: A(69), B(495), C(22), D(7), E(0) #3187386
統計: A(69), B(495), C(22), D(7), E(0) #3187386