A、A.ready for entrance
B、B.ready for entrance，but gates cannot be closed completely
C、C.being made ready for entrance
D、D.not ready for entrance
更多“A flashing green light displayed at a single lock means that the lock is（）.”相关的问题
A、flashing red lights upstream and fixed red lights downstream B、yellow unlighted buoys C、signs and/or flashing red lights D、red daymarks upstream and green daymarks downstream
A、Flashing red lights upstream and fixed red lights downstream B、Yellow unlighted buoys C、Signs and/or flashing red lights D、Red daymarks upstream and green daymarks downstream
A、white light whose characteristic is Morse (A) B、group-occulting white light C、composite group-flashing (2 + 1) white light D、composite group-flashing (2 + 1) red or green light
A、Orange/white, orange, green/white, blue, blue/white, green, brown/white, brown B、Blue, blue/white, orange/white, orange, brown/white, brown, green/white, green C、Green/white, green, orange/white, blue, blue/white, orange, brown/white, brown D、Orange/white, orange, brown/white, brown, green/white, green, blue, blue/white
A、Black，Green，Red，Yellow B、Black，Red，Green，Yellow C、Red，Black，Green，Yellow D、Yellow，Red，Green，Black
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