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單項(xiàng)選擇題

How is the intensity of a light expressed in the Light Lists?（）.

A.Luminous range
B.Geographic range
C.Nominal range
D.Meteorological range

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單項(xiàng)選擇題

From your position you observe a rotating white and green light to the north. This light is most likely（）.

A.from a submarine on the surface
B.the light at Southeast Point
C.at an airport
D.on a coastal patrol vessel

單項(xiàng)選擇題

Fishing stake，the position of which frequently（），exist in the area covered by this chart.

A.removed
B.altered
C.corrected
D.converted

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