When visibility is restricted（），we can say it is restricted visibility.<br>A:by long distance<br>B:by the darkness at night<br>C:by a vessel in front<br>D:by fog or falling snow

When visibility is restricted（），we can say it is restricted visibility.
A:by long distance
B:by the darkness at night
C:by a vessel in front
D:by fog or falling snow

出自：海船船员证

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