A、the period of darkness exceeds the period of light
B、there is only a partial eclipse of the light
C、the periods of light and darkness are equal
D、the period of light exceeds the period of darkness
更多“An occulting light is one in which （）.”相关的问题
A、the period of darkness exceeds the period of light B、there is only a partial eclipse of the light C、the periods of light and darkness are equal D、the period of light exceeds the period of darkness
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、A.white light FL (2) and a topmark of 2 black spheres B、B.occulting green light and may be lettered C、C.yellow light and will be numbered D、D.continuous quick white light and may be numbered
A、A.shows a light with varying lengths of the lighted period B、B.shows a light that changes color C、C.marks an alternate lesser-used channel D、D.is used as a replacement for another light
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