在船上应当日出时升起国旗。（）<br>A:On board national flags should be hoisted when the sun sets.<br>B:On board national flags should be hoisted when the sun rises.<br>C:On board national flags should be lowered when the ship is in port.<br>D:On board national flags should be hoisted flag when loading and discharging

在船上应当日出时升起国旗。（）
A:On board national flags should be hoisted when the sun sets.
B:On board national flags should be hoisted when the sun rises.
C:On board national flags should be lowered when the ship is in port.
D:On board national flags should be hoisted flag when loading and discharging

出自：船舶水手证

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